Maybe there will be some Galaxy S II customers that will need an answer. I tried (emphasis on tried) the Galaxy S II with T-Mobile. Not sure if all of the variants had this problem, but it wouldn't surprise me if it did since the international version had it. There were several quirks with this phone that made me ultimately return it. One of which was the lack of my phone vibrating when I receive a text, even though Go SMS was set to vibrate and my profile under sounds was set to vibrate. I finally got it to vibrate once I went under sounds and then went under vibrate intensity, then increased the haptic feedback. That makes absolutely NO sense. At that point, the phone would vibrate based on the intensity. As a consequence, however, my haptic feedback was on whenever I was typing (even though I had not turned on haptic feedback under sounds). I am used to an HTC device. I can easily switch from Silent, Vibrate, and Ring by moving the volume rocker up or down. With the Galaxy S II, I had to download an app just to switch it to Silent (no sounds). Silent to Samsung means Vibrate. I could go into the sounds menu and tell it to never vibrate, but that also means it'll only move from silent to ring and my phone is never set to ring during normal activities. This is something that Samsung could easily fix; let the consumer control the sounds via the volume rocker, but include vibrate as an option. One last frustration was that the phone would buzz once the battery was fully charged even if I had the phone set to silent. It woke me and my wife up one night and we didn't know what the noise was until I figured it out while it was charging at work one day. I switched it to ring, and played around with all kinds of settings to no avail; it would ring or vibrate, depending on the setting. For those who want to deal with this, maybe this will help; someone put a video on youtube to show you how to use an app called Tasker that supposedly will fix the 'battery full' notification. Custom ROMs may help as well. I loved the screen, the size, and the slimness of my T-Mobile Galaxy S II. Loved that the charger was at the bottom near the microphone as well vs on the side like HTC. However, I don't feel that I should have to do all these different things to move my phone from silent to vibrate or vice versa. Audio managers are good, but it makes me wonder if they were created because of how Samsung handles sounds. Developers make apps to customize your phone, but controlling my sounds should be a basic feature and until Samsung addresses this, I will stick with HTC. I may try LG, but the G2X was not a great start for them on T-Mobile... hope this helps someone.