This problem happens to some users when turning on the smartphone for the first time or after an update. And it is given by the compilation version of the system software: those that do not have problems are B160 and B170, although it is true that in the case of the first one it is not so generalized.
For this there are two solutions: or manually update the phone, either via OTA or from our computer; or by unlocking and unlocking the bootloader to go back to compiling B150. If the mobile is free, you can update insurance; and if it is an operator, we believe that too, although we do not put our hands on fire for all companies.