No root, engineering mode veered mbn configuration options, resulting in the loss of mbn configuration, you can not search for mobile networks.
Reboot several times to change the configuration are invalid, empty the network settings are invalid, restore the factory is invalid, recovery three clear invalid,
Do not want to disassemble root trouble, QPST configuration is also less likely, unwilling to get.
The solution is actually quite simple, pro-test available:
1 with cloud services or special app back up phone data Documents, etc.
2 Follow the steps Brush Mobile Forum, select the appropriate official line brush package, wire brush to resolve.