I do not know English, I write this using an interpreter.
General premise came to me with this smartphone.
Found two strange problems.
1) it is not no sound at all through the speakers or through headphones. When turned on, the default sounds and so on. However, when there is a switch on the radio sound over headphones or through speakers. Tried different firmware. The problem is not resolved.
2) Do not see the network or writes restricted access. Contacts SIM card spots but no network. 112 (number Sos) calls. Sometimes when there is a network of long while. Check calls, well I did not hear. (checked through the microphone voice recording on the recorder).
What can you advise?