iOS 6.1 show no service randomly since beta1
I tried iOS 6.1 beta1.2.3.4.5 and now the final release all the versions showing NO SERVICE randomly at places with full coverage and I can only kick it to work by reset network setting and the network came back for few minutes then NO service again.
steps I made so far
1- restore to 6.1 betas and final release
2- update from 6.0.2 to 6.1 final release (today)
3- tried different carriers.
4- switched off the LTE / 3G .
non of the above steps worked I'm sure there is bugs causing this issue and it's still in the final release .
one thing I didn't try yet ( climbing the cell tower)😝
please tell me if any one facing the same issue?
P.S it happen to 4 iphones 5 mine and brother's
iPhone 5, iOS 6.1, bugs on ios 6.1