I've spent the last couple of days trying to fix the following problem, and finally stumbled upon a solution by chance looking through the forums for other phone models, posting it here in case anyone has a similar issue. I got a my One V a month ago, all worked perfectly until, without any reason, the 3g connection stopped working. I could connect to the network, but could not send or receive data. I tried resetting the APN, and even entering APN details manually but did not solve the issue and ended up doing a full reset on the phone. Last week the issue cropped up again, not wanting to do a full reset again I found this workaround is effective. 1. Turn Airplane mode on 2. Shut down & restart phone 3. When phone is restarted, take phone out of airplane mode, connection should work after a minute or two. Not the most ideal of fixes but hope this helps anyone with a similar issue, could not find anything about this problem on HTC's website.