I have used a LG original LG Filter (LT500P/5231JA2002A) produced by Cuno Water Group on LG LSC26905TT Refrigerator since June 16, 2012. And in July 2014, my refrigerator did not make ice, but water tasted ok. I realized that I have not changed filter for two years that make filter clogged and pressure was low that leading to no ice produced. Once I replaced filter, it recovered to produce ice. That means my filter does worked well for full two years. What a high performance!
I replaced old filter with other maker produced filter but it contained many residues and white particles.
I will buy original LG made filter.