Curve 8300 no radio or signal

Hi,

I have a Curve 8300 unloked, the phone is from AT&T Mobile and i using it on Dominican Republic with the company ''Claro'' this company was called Verizon here, well i bought it in internet so i have 2 months with my phone, now sometimes it is without signal or radio and all is correct on the connection manager, so i wiped it, i was reinstalling the OS and nothing, the phone still without signal or radio, i dont know what to do. A person told me the problem is not the loked or unloked because the phone is unloked.

What is the problem?? What can i do?? i'm doing all... chancing the sim, the memory, the battery, softwares and nothing.

Please i need the solution.

Thanks.:confused:

Did you go to Manage Connections and turn the radio on?

Yes i did,, but nothing work.