ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Black

Loading options...

FREE shipping

 from this seller
 

Shipping

Type
Arrives
Cost
Standard
Data unavailable
Free

Pickup not available

 

Pickup

This item is not available for pickup or at any of the Walmarts within 50 miles of your location.
 
  • $79.05
    +Free shipping
    SaveTronix SaveTronix
    Rating unavailable
    |

Other sellers on Walmart.com

In addition to Walmart.com items, we offer you products from our Marketplace Retailer partners to give you a wide range of choices.

  • Marketplace items are not returnable to Walmart.com or Walmart stores
  • Marketplace Retailers ship the items you buy from them
  • Tracking details (if available) can be found in your Walmart account

Phone: 

Email: 

 Return Policy

Wired modem only - Does not include Router, Wifi, VOIP, television, or telephone support Requires CABLE Internet Service, if not sure your provider is CABLE call them to confirm Compatible with ALL Major CABLE providers like Comcast/Xfinity, Cox, Charter, Time Warner, Mediacom, Bright House. Is not
Customers also considered

About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.
New-ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Black

About this item

Important Made in USA Origin Disclaimer: For certain items sold by Walmart on Walmart.com, the displayed country of origin information may not be accurate or consistent with manufacturer information. For updated, accurate country of origin data, it is recommended that you rely on product packaging or manufacturer information.

New-ARRIS SURFboard SB6121 DOCSIS 3.0 Cable Modem Black

Wired modem only - Does not include Router, Wifi, VOIP, television, or telephone support Requires CABLE Internet Service, if not sure your provider is CABLE call them to confirm Compatible with ALL Major CABLE providers like Comcast/Xfinity, Cox, Charter, Time Warner, Mediacom, Bright House. Is not compatible with Verizon FiOS or AT&T U-verse Internet speeds based on your Cable provider service - up to 172 Mbps download and up to 131 Mbps upload Rear panel color coded for ease of installation BROWN BOX models NOT VALID for this item, should report to Amazon immediately and RETURN to Seller

Specifications

Color: Multicolor
Condition: New
manufacturer_part_number: SB6121
Connector Type: 1 x Cable, 1 x DC-in, 1 x Ethernet
Operating System: Windows 2000, XP, Vista, 7; Mac OS X; Linux
Interface Type: 10/100/1000Base-T
Brand: Arris
Is Dark Sky-Compliant: Y
Show
Best seller ranking:

Customer Q&A

Back
Questions & Answers 163 questions
1-3 of 163 questions

Ask a question

If you would like to share feedback with us about pricing, delivery or other customer service issues, please contact customer service directly.


Q&A tips and guidelines

Q&A Exchange Guidelines

When writing your question or answer, please follow these guidelines:

  • Do: Make sure your question is directly related to the product
  • Do: Be specific and provide as many details as possible
  • Do: Include the model number (if applicable)
  • Do: Write your question in English
  • Do Not: Include personal information (such as your full name)
  • All submitted questions and answers are subject to the terms set forth in our Terms and Conditions

We reserve the right not to post your question or answer if it contains any of the following:

  • Any information not related to the actual merchandise or topic
  • Obscenities, discriminatory language or other language not suitable for a public forum
  • Advertisements or “spam” content
  • Email addresses, physical addresses or other forms of contact information
  • Critical or spiteful comments on other questions or answers posted on the page or their authors
  • Any imagery that demonstrates incorrect use of the merchandise
  • Anything that Walmart deems to be inappropriate, at Walmart's discretion

Provide as many details as possible, including the model number (if applicable).

Remember: Don’t include personal information (such as your full name).


Preview Question

Thank you.

Questions will be checked against our question guidelines and posted within five to seven business days.

Back
by garry1988 9/10/2012
10 answers
  • A. No - and you should never plug a computer directly into the modem - you are a sitting duck on the Internet, open to all kinds of automated port scans and other hack-attacks until you put your computer (or network) behind a NAT router. It's not a total security solution by any means - but to a "hacker" on the other side of earth - it's much better to have them stopped in their tracks at your router than able to directly access your PC . Since practically all of the home routers run some flavor of Linux (not Windows) - the Windows vulnerabilities hackers use to exploit ports on your PC become irrelevant. Note that it's possible to protect yourself without a router but you'd better understand the ins/outs of a firewall or other advanced security appliance - and know how to deploy it.
    by IHateCrapFromChina3/10/2016
    Was this answer helpful? (19) (9)
    Was this answer helpful?
  • A. No. If you want to connect it to more than one computer you will need a router.
    by pffffffffffft11/11/2015
    Was this answer helpful? (30) (4)
    Was this answer helpful?
  • A. no, this is a cable modem that will plug into your computer. If you want to be wireless you will need to buy the wireless router seperately
    by nannerkz1/31/2016
    Was this answer helpful? (15) (1)
    Was this answer helpful?
  • A. No It Doesn't have a router as Walmart advertised, I am so glad my Apple Extreme Wireless Router Does have ports!!!!
    by DonHam3/21/2016
    Was this answer helpful? (6) (1)
    Was this answer helpful?
  • A. Not this model.
    by Malcolm5911/11/2015
    Was this answer helpful? (5) (0)
    Was this answer helpful?
  • A. this model does not have a built in router.
    by Hanztertonfield12/25/2015
    Was this answer helpful? (9) (2)
    Was this answer helpful?
  • A. No it does not. You will need to plug this modem into a third party router i.e. Linksys, D-Link, Netgear
    by netrrhexis12/15/2015
    Was this answer helpful? (8) (2)
    Was this answer helpful?
  • A. Not this one but I was reading that Moto has one combo unit modem/ router but the reviews are not that good and is more pricey ...
    by EVegas12/25/2015
    Was this answer helpful? (10) (1)
    Was this answer helpful?
  • A. Nope, this is a cable modem only. You can of course connect your choice of wireless router. cheers.
    by johnetx11/10/2015
    Was this answer helpful? (6) (0)
    Was this answer helpful?
  • A. Nope, this is a modem only, of course you can connect your choice of wireless routers. Cheers.
    by johnetx11/16/2015
    Was this answer helpful? (6) (1)
    Was this answer helpful?
Back
by Dev 10/12/2012
10 answers
  • A. No. The coax is the cable your internet provider runs to you house.
    by jww623/5/2016
    Was this answer helpful? (29) (12)
    Was this answer helpful?
  • A. The coaxial cable is the one that comes through the wall and provides your cable service. This modem has the jack to connect that cable.
    by pffffffffffft2/27/2016
    Was this answer helpful? (36) (1)
    Was this answer helpful?
  • A. You will need to purchase the coaxial cable seperatly. Measure the distance from hook up to you computer to make sure you buy a long enough cable.
    by nannerkz12/23/2015
    Was this answer helpful? (6) (5)
    Was this answer helpful?
  • A. there is no coaxal cable in this kit, must purchase seperate!!!
    by DonHam9/18/2015
    Was this answer helpful? (4) (1)
    Was this answer helpful?
  • A. The product does nto come with the Coaxial Cable.
    by Malcolm597/28/2015
    Was this answer helpful? (3) (2)
    Was this answer helpful?
  • A. it does not come with a coax cable, you must provide your own.
    by Hanztertonfield9/1/2015
    Was this answer helpful? (4) (2)
    Was this answer helpful?
  • A. No. The cable company usually supplies the coaxial cable
    by Throckmeister9/30/2015
    Was this answer helpful? (5) (1)
    Was this answer helpful?
  • A. Yes, there is a coax connection on this model.
    by TheGuynMD12/3/2015
    Was this answer helpful? (17) (0)
    Was this answer helpful?
  • A. According to the spec sheet there is an "F" connector which means yes, coaxial cable can be connected to this modem. This would be expected since this is a cable modem.
    by An anonymous customer11/15/2015
    Was this answer helpful? (15) (2)
    Was this answer helpful?
  • A. No coaxial cable.
    by salem97411/15/2015
    Was this answer helpful? (3) (8)
    Was this answer helpful?
Back
I need a modem that has that capability since my phone co uses cable thru' a modem.
by mustangchar 9/23/2012
8 answers
  • A. It has an rj-45 jack, which is a standard telephone jack.
    by pffffffffffft6/30/2016
    Was this answer helpful? (31) (29)
    Was this answer helpful?
  • A. It has 3 plugs. 1 to hook coxial cable, 1 for the power cord and one for the ethernet cord that will plug to other divices such as a computer.
    by nannerkz6/30/2016
    Was this answer helpful? (14) (9)
    Was this answer helpful?
  • A. No, If your on TWC you keep the TWC issued modem at no charge for your phone service and the SB6121 modem will now be your internet modem!!!
    by DonHam6/30/2016
    Was this answer helpful? (24) (1)
    Was this answer helpful?
  • A. No
    by Malcolm596/30/2016
    Was this answer helpful? (4) (2)
    Was this answer helpful?
  • A. this modem does not have a phone line.
    by Hanztertonfield6/30/2016
    Was this answer helpful? (13) (2)
    Was this answer helpful?
  • A. No phone jack
    by EVegas6/30/2016
    Was this answer helpful? (10) (2)
    Was this answer helpful?
  • A. Yes, I have Vonage and it goes through the Internet also.
    by samdu6/30/2016
    Was this answer helpful? (1) (9)
    Was this answer helpful?
  • A. No, this is strictly a cable modem. Note - this is NOT compatible with dsl or Uverse.
    by johnetx6/30/2016
    Was this answer helpful? (14) (1)
    Was this answer helpful?
1-3 of 163 questions See all
1-3 of 163 questions

Customer Reviews

Customer Reviews | 794 reviews | 4.5 out of 5

4.5 stars

794 reviews | 4.5 out of 5

4.5 stars

794 reviews | 4.5 out of 5

94%
Would recommend to a friend
5 stars
579
4 stars
148
3 stars
26
2 stars
5
1 stars
36
1-10 of 722 total reviews
94%
Would recommend to a friend

Age

Gender

Easy to hook up
4/27/2014

Customer review by Lockdude74

5.0 stars 4/27/2014 by Lockdude74
by Lockdude74
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

Works great with my Cox high speed internet connection.

Was this review helpful? (29) (8)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
Lockdude74
Would recommend to a friend? Yes
Age:55 - 64
Ownership:2 - 7 weeks
Gender:Male
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Just right for home use. Stop paying rental fees.
2/20/2014

Customer review by KRDJ

5.0 stars 2/20/2014 by KRDJ
by KRDJ
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

When I learned I was paying Time Warner Cable $7 a month for a DOCSIS 2.0 modem (no longer in use) for many years and could purchase my own - I did. I followed the "where to plug in the three cables" instructions (cable company line, ethernet line to router and power line). With my computer and modem on, I called "TWC technical support" to give them the MAC ID number on the side of the unit. The TWC rep "set up" my new modem and removed the monthly charge. The entire process of hooking it up and finishing with TWC was less than ten minutes. I took longer to hide the new power cable behind my desk. Ordering online is a few bucks cheaper than purchasing in the store (and cheaper than Best Buy, Office Depot and Frys). My Walmart is a few blocks away so I had mine shipped to the store. They emailed me when the modem arrived. Walmart has a special line for "ship to store" pickups - so no waiting in the "merchandise returns" line. I will never pay a monthly modem fee again. So far, so good. Thank you Walmart.

Was this review helpful? (282) (29)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
KRDJ
Los Angeles, CA
Would recommend to a friend? Yes
Age:55 - 64
Ownership:2 - 7 weeks
Gender:Male
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Does the job well, for a good price.
10/19/2013

Customer review by HiDefPCs

4.0 stars 10/19/2013 by HiDefPCs
by HiDefPCs
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

This is my second purchase of this model. First one 6 months ago is at home and this one at my son's college house. Both needed to be Comcast compatible and DOCSIS 3.0 to be future proof. They are fast, and easy to set up after the required call to Comcast support to allow them on their network. My only complaint with the modems is every once in a while they trip off and restart for no reason. I have not researched this issue yet, because it is very brief, albeit annoying. Another complaint is with Walmart's stock reporting system. My second one's online purchase confirmed in stock status, but none was at the store when I arrived, the out of stock text came while I was leaving the parking lot. So, I cancelled that purchase and ordered it from a store near my son's house, which also showed it in stock, but a text came saying it was on back order a few days. There is definitely a problem with Walmart's stock inventory network and its communication with their online store.

Was this review helpful? (61) (8)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
HiDefPCs
Salem, OR
Would recommend to a friend? Yes
Age:45 - 54
Ownership:2 - 7 weeks
Gender:Male
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Setup was automatic with Comcast cable
10/15/2013

Customer review by Bebo2

4.0 stars 10/15/2013 by Bebo2
by Bebo2
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

I am not enough of a tech. to know or use all the features but for my 4 lan and 3 wifi house it works perfectly. The modem set itself up and got on line with Comcast automatically. I had to fill in a few questions about my account on line and then it was up and running. I did call Comcast tech support just to make sure all was well and the operator confirmed that the Motorola SB 6121 had setup automatically. My old Zoom modem worked great for 4 years but then Comcast changed something in their system and it began to drop the connection. Comcast, of course, wanted me to pay $8/month to rent one of their modems. Buying my own from Walmart for less than $80 made more sense to me. The Morotola SB6121 is rated one of the top compatible modems at the Comcast tech site. In another 3-4 years some other change may out date this modem but by then it will have paid for itself 3-4 times over. I guess I need to put the Zoom on craig's list.

Was this review helpful? (49) (9)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
Bebo2
New Mexico
Would recommend to a friend? Yes
Ownership:2 - 3 months
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Excellent modem for the price!
10/29/2013

Customer review by techie222

5.0 stars 10/29/2013 by techie222
by techie222
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

I decided to purchase this modem after our previous Motorola SB5100 began having sync issue. After spending nearly an hour troubleshooting our connection issue with cable provider, I was offered a replacement through them at a monthly lease charge of $6.99 a month. For that amount I justified the cost of this replacement and avoiding the monthly charge. Setup of the Motorola SB6121 was easy and straight forward. A 10 minute phone call to cable tech support to switch out the equipment and we were back up and running. Our internet connection is a 30x5 we were averaging 19x1 with the old modem. We now are getting 30x4.3. The added feature of the multi-speed Ethernet port is nice. If your Router WAN Port is Gigabit capable, the lag when connecting and downloading is gone. The modem is great for those who stream video, music, and online game. It also resolved a lag issue when streaming content from our DirecTV dvr.

Was this review helpful? (51) (8)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
techie222
Brunswick, OH
Would recommend to a friend? Yes
Age:35 - 44
Ownership:2 - 7 weeks
Gender:Male
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Great modem!
12/24/2012

Customer review by Kelita909

5.0 stars 12/24/2012 by Kelita909
by Kelita909

I bought this modem after Time Warner decided to start charging a lease fee for their modem. After using it for a full day, I no longer lose my wireless connection on my laptop and have been streaming Netflix all day with no streaming loss. Both of those were huge issues daily. I am more than satisfied with this product! A word of caution to TWC internet and phone users. The first tech told me if I were to buy my own modem, I would have to return their modem to a TWC store for a phone-only modem. Thankfully, I decided to get the modem up and running before wasting time and gas going to a store with the old modem in tow. The second TWC CS I contacted to add this modem on my account told me I did NOT have to return the old modem; they would just give me the same one (Arris) anyway as it was a phone and internet modem. She hooked me up, removed the modem lease charge and made sure everything was fine with the old modem which is now only working for phone-only. Just make sure to get a 5-1000 splitter (Walmart only had a 5-2000 which works fine) and a 2 more coax cables to hook up both modems.

Was this review helpful? (64) (10)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
Kelita909
Highland, CA
Would recommend to a friend? Yes
Age:45 - 54
Ownership:1 week or less
Gender:Female
Usage:Every day
Does the Job Well
1/16/2014

Customer review by SilverCoyote

5.0 stars 1/16/2014 by SilverCoyote
by SilverCoyote
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

I purchased the Motorola SURFboard SB6121 DOCSIS 3.0 Cable Modem as an upgrade from a DOCSIS 2 modem so I could take advantage of the higher 50 Mbps speed offered by my cable company. It was very easy to set up: I followed the directions in the startup guide, connected the ethernet cable, and contacted the cable company so they could complete the activation. (If one is setting up cable service for the first time, the steps may be a bit more involved, but the modem itself is not difficult). So far it is working just fine. It looks nice on the desk, doesn't take up a lot of room (it's "footprint" is about 1.5" x 5") and I like that the LED status lights on the front are little icons, so one can tell at a glance which is for power, connectivity, etc. My previous modem was also a Motorola SURFboard product, and it was working fine after more than 18 months. As earlier mentioned, I only replaced it to be able to upgrade to higher internet speeds. With the cable company wanting $7.99 per month to rent a modem from them, it had already more than paid for itself. I fully expect this one will do the same.

Was this review helpful? (29) (3)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
SilverCoyote
Denison, Texas
Would recommend to a friend? Yes
Age:55 - 64
Ownership:1 week or less
Gender:Female
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
bought this modem to own myself
5/9/2014

Customer review by ssvenn

5.0 stars 5/9/2014 by ssvenn
by ssvenn
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

if you have cable like Comcast----------MAKE SURE THAT YOU DISCONNECT THE COMCAST MODEM AND TAKE IT BACK TO COMCAST AND TELL THEM YOU OWN YOUR OWN MOODEM NOW00A SAVE-INGS OF 8.00 OFF YOUR BILL AS NO MORE RENT THEIRS-------BECAUSE THIS IS THE ONLY WAY THATA THEIR PHONE OFFICE WILL NE ABLE TO GET YOU UP AND RUNNING--THEY HAVE TO SEE ON THEIR COMPUTERS IN THE BILLING OFFICE THAT YOU RETURNED THEIR OLD MODEM TO YOU BEFORE THEY WILL CONNECT YOU-------SO MAKE SURE YOU FOLLOW THIS ADVICE--IT WILL MAKE YOUR NEW MODEM GET ON LINE RIGHT OFF-----OK THATS THE DEAL THIS MODEM DOES REAL FAST FAST AND I HAVE THE SLOWEST HI SPEED COMCST OFFERS(29.00-PER MONTH) AND IT WILL DO YOUTUBE-VIDEOS LIKE THE FASTEST HISPEED-----SO YOU CAN GET THE CHEAP HI SPEED LIKE I HAVE AND IT WILL WORK FAST WITH THIS MODEM

Was this review helpful? (115) (20)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
ssvenn
whiting ,nj
Would recommend to a friend? Yes
Age:65 or older
Gender:Male
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Delivered the improved speed expected
7/10/2014

Customer review by Metusalen

4.0 stars 7/10/2014 by Metusalen
by Metusalen
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

I followed the recommendation from my Internet Service Provider (ISP) to get a DOCSIS 3.0 modem to replace my older model. After carefully looking for reviews, this model was highly rated. It was delivered within the expected time. I was a able to install it right out of the box just following the Read Me First instructions. I noticed the power transformer gets very hot (will keep checking). I performed a speed test and yielded 18.51 Mbps downloading and 7.12 Mbps uploading from an old Sony VAIO (2011) model. My ISP claims it can deliver 25 Mbps. Verifying if the firmware was up to date was rather cumbersome. The firmware loaded 1.0.6.10 is not the latest from the manufacturer, there are other newer versions available 1.0.6.12. I have been using it for 3 days concurrently with 2 MacBooks, one Sony VAIO, and 2 iphone 4s, serviced by a Airave GPS antenna hooked up to the router. Very good!

Was this review helpful? (11) (2)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
Metusalen
Would recommend to a friend? Yes
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
Was expecting it to be more difficult
3/29/2013

Customer review by phoneguysofl

5.0 stars 3/29/2013 by phoneguysofl
by phoneguysofl
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.

When ordering Comcast internet, I decided to buy a modem rather than pay $7.00 per month for the rental of thier router. I only want internet from Comcast, maybe more later. I was expecting a need to program the unit for it to work properly. I looked for an instruction book for programming and there is'nt one. You must go online for that. I would much prefer a physical manual. It was a surprise to me when I plugged it in and immediately had internet access! Everything worked after a two minute install (plug three cables in). There has not been one glitch! I am happy with the modem and my decision to buy it.

Was this review helpful? (31) (1)
Thank you! You have successfully submitted feedback for this review.
Was this review helpful?
phoneguysofl
South Florida
Would recommend to a friend? Yes
Age:55 - 64
Ownership:1 week or less
Gender:Male
Usage:Every day
Verified purchaser
Verified purchaser
Customer has been confirmed to have purchased the item from Walmart.
1-10 of 722 total reviews See all
1-10 of 722 reviews

Customer Reviews | 794 reviews | 4.5 out of 5

Customer Reviews

Was this review helpful?
Was this review helpful?
Customers also viewed these products

Policies & Plans

See any care plans, options and policies that may be associated with this product.

Warranty Plan

Walmart Product Care Plans
A limited product warranty is included free for most items. With an optional Walmart Care Plan you can enhance the manufacturer's coverage from the date of purchase. Walmart Product Care Plans cover 100% of the cost for repair or replacement, including shipping charges for the exchange.

We'll show you Care Plan options and pricing at checkout if applicable, or go to www.walmart.com/careplans for more information.

Product warranty:  Year Years See details

Warranty Information: 1 Year
Did you buy this in a Walmart store?  Get a warranty for it here.

Gifting plans

Gift options are not available for this item.

Pricing policy

About our prices
We’re committed to providing low prices every day, on everything. So if you find a current lower price from an online retailer on an identical, in-stock product, tell us and we’ll match it. See more details at Online Price Match.