I reported the bug-per a previous post suggestion. My echo happens randomly under standard calling conditions. No bluetooth, speaker phone etc. Twice I gave up on the call, because after hanging up and calling back 4+ times, my voice was still echoing. Very annoying. This has happened to me 4x in the past 11 days. At least twice, I was in a solid 4g area. Once, my phone appeared to be in between? Just gray bars. I am not tech savvy like many, but I do expect my G'nex to make and receive phone calls without issue or advanced OS troubleshooting knowledge.