anybody else have this problem? im about to send my phone in to get replaced but would love to keep it if i could find a fix. basically whenever my phone uses wifi it disconnects itself from tmobile and i cant make or receive calls. i just checked the status and it says mobile network status disconnected. in order for me to restore service i have to disable wifi and wait until i see a data icon 3g/e/h on the status bar. also when my phone sleeps it disconnects from both wifi and the mobile network and cant receive or make calls either.