Hi, I've got a second handed i9000 and had to reset it to factory settings. what happened after that is my phone cannot connect to any network. I'm not talking about internet, but simple phone connection, I simply have no reception. it happens with several sim cards that I tried, and searching for a new network leads to nothing. black screen. has anyone ever hear of such a problem? what can I do? and where can I get the phone fixed? thanks!