First, during the conversation with the caller, check that the microphone is muted noise reduction! Second, you need to get into the service menu for all devices in the dialer need to dial the following combination - 319712358. Require a password on runoff firmware is strictly individual:
Simplified service menu - * # 9090 #, available on all devices!
- SKT - 996 412
- KT - 774 632
- LG U + - 0821
The network set the GSM All priority settings.
Or you can setSKT Hidden Menu +
through the market and change the same priority networks in the relevant program settings.
The only way to solve the problem with the connection is broken, there are more options.
To find the answer to your question in the search engines was enough to write "cut off communication", that's all.
Post has been editedParadiseL - 30.04.14, 19:26
Added to the cap. The "Useful".