framma. did this start happening before you flashed it or after? if its before its most probably a faulty phone or you dropped it and the reception part of the phone is damaged(happened to me, sent mine to the shop to get the part fixed) so the connection is very low which only allows you to make emergency calls. if it was after the flash, i actually don't know...does the phone work fine other than the calls?...maybe you should try reflash