Hi, im using the iPhone 4s, i realised sometimes my phone is losing data connection even though the 3g signal is full, and i had to toggle airplane mode on and off gain to get the data connection again. and sometimes too when i leave my home (which doesnt have 3g coverage) to a big street (that has 3g connection coverage), the signal is still at Edge, but when i toggle airplane mode on and back off, it will get the 3g at full bar. i have tried resetting network settings, and even restoring my phone as new, but still no luck. now i turned off the cell network search in location service setting, all things are normal again. is there a bug in cell network search?