I have been a T-Mobile customer for 2.5 years and I have kept my original Motorola v60 that entire time. I have been very happy with the phone and up until its recent death I was still getting great reception and amazing battery life. (I only had to charge it once every 6-7 days with an average of 20-30 minutes of talk time per day).After my v60's demise I followed the advice of several reviews and posts as well as the T-Mobile representative and purchased a Samsung x475. I greatly regret this decision and will be taking the phone back today. I was looking for a phone with good battery life and good call clarity; the Samsung x475 most definitely does not meet those requirements.My first complaint is that while people on the other end of the phone seem to have no problem hearing me, I have a terrible time hearing them. There is plenty of volume coming out at my end but the sound is so distorted and garbled that I frequently can't understand what people are saying. This phenomenon exists no matter what volume setting I have the phone set to, and no matter who I call. Even land lines come through with the same grating distortion. The effect is similar to pumping a book on tape loudly through badly blown speakers. You can hear that the device is being overdriven and much of the sound at certain frequencies is simply lost. (This problem is especially pronounced when the caller at the other end has a voice in the lower register)My second complaint is that the battery life is atrocious, especially when compared to my v60. I acquired the phone at 7:00 PM on Thursday, I charged it over night for 12 hours and first powered on the phone at 8:00 AM on Friday. Over the course of the following three days I set the time and ring tone, adjusted records in my phone list, and made phone calls totaling 43 minutes and 6 seconds. The phone was also powered off from 8:00 PM Saturday night until 8:00 AM Sunday morning as I went to see a film and forgot to turn the phone back on. By 8:00 PM Monday night, 72 hours of standby, 43 minutes of talk time, and roughly 15 minutes of menu navigation later, the battery on the phone was completely dead.I would definitely recommend that anyone interested in T-Mobile and the phones they offer not settle for the Samsung x475. There are many better phones around, hopefully I will be able to find one to replace my v60 soon.