Originally Posted by tsac
SOS indicates you have no service in the area. The delay may be also your area. If you do not have full bars or at least most of them you may be in a bad area. Calls and emails will be affected. Try to see if your carrier has a web site and shows their coverage in your home area. Bad coverage ? It may be time to see if others have the same problem and if so a carrier change may help . If others do not have the problem it may be your phone has problems. Generally apps added wont cause reception issues unless you have no free memory and the phone cannot process the required function.
my wife and i have the same 8520 and hers is on EDGE plus a full bar so the coverage is fine, i can clearly say its the phone but the again am not sure if the os can affect how the antenna works, please if anyone can help me do so please,thanks