I have the same probem.. but MINE is critical. Tried hard resetting my device, but can't add account, set the time setting to correct, even the youtbe login trick.. My father gave me this phone few weeks ago, and it worked smoothly.. I even downloaded apps and fonts, updated the os from Froyo to Gingerbread, and it worked smoothly.. All it started two days ago, when i tried to download an app on the market, but says, no connection, but i can browse on my phone's internet browser..