Good day to all!
There is a problem:
There is N9, which, after changing the SIM card, began to demand the "Security Code". After reading a bit of forums, I found out that the problem can be caused by the program Track & Protect, and maybe not only to it.
Tell me how you can get rid of this disease.
Judging by the comments, even a flashing does not really help.
In fact, the main question is whether it is possible to solve the problem of firmware without a programmer, by improvised means (USB, PC).


P.S. Interestingly, a lot of such topics exist and none of them have an answer, except for indirect ones.