if it's an iphone, go settings ---> general ---> reset, then reset network settings. You'll need to re-enter any wifi network passwords but that might help get regular service back.
Tends to happen after a network failure, and also I've always had to do it after roaming.
if it's an iphone, go settings ---> general ---> reset, then reset network settings. You'll need to re-enter any wifi network passwords but that might help get regular service back.
Tends to happen after a network failure, and also I've always had to do it after roaming.