Phone redial problem. How to fix?

Question

Android

Phone Lenovo A2010. The situation is as follows: after I received an incoming call (spoke and hung up), I try to redial this contact again (the subscriber is recorded in contacts), but the number is not dialed, because the number +7 is not in dialing. This problem occurs with the Beeline operator. Then I tried to check with the Megafon operator - when you redial the number, the number itself is generally hidden and it is impossible to dial it. I decided to make a hard reset of the phone - it helped, the problem disappeared. But after some time it happened again and is still present, it is not clear for what reason ... Who can help in this trouble?
PS (it is not advisable to constantly do a hard reset)

Answer 1

Alexey, thanks for the help, installing PixelPhone helped