Cannot use Code

[Jeus]

My device is A20s(4/64).But I can't use "*#0*#" code.Can anyone give me a proper solution or is there anyone facing same problem?        

[Ehsank]

its not work on Samsung phones

[Jeus]

may be there is something wrong with my proximity sensor. How can i check my sensor?

[Ehsank]

brother this code is not related to sensors