2018-02-05 v1.6.1 Fixed gaps in the blocking logic, and as a test, a lock is implemented and when calling the Engineers by standard code (*#*#3646633#*#*).Engineer Mode MTK 1.6.1 Update
v1.6 Added the ability to deny access to the Engineering Menu through this application. (Protection from children and strangers)
To do this, dial in the dialing code: *#*#505#*#* .
To return access, you need to dial the same code again.