I had the Samsung V205 and then I decided to try the E715 out. FYI to people with battery problems, with these kind of batteries, you must let it drain completely and then charge it.. kind of like building up your battery life and doing this a few times, it will improve your battery life immensely. I've been a T-Mobile customer for a while now and I stay with them because: 1) They are now no. 1 in customer service, 2) Great rate plans, 3) It works great where I need it the most!