it may be temporary problem ... you can do following things:
1. switch off your phone and change your sim cards
2. or you can delete all APN and re-create manual
3. or if your network got connected but access not working than you can delete your host file from System/etc/host (rooting req.)
Hi Guest we just wanted to alert you to a major change in the forum. We will no longer be allowing the posting of outgoing links. Please use the attachment feature to attach media to your posts.