f480 stronge problem!!

[mostafa-oujdi]

i have one samsung f480 it work perfect; but if i put key phoe off; phone loose network; immediately if i put key lock on , phone work again!!!
any one have this problem before!!
many thanks advance!!

 

[djibrilcoulibal]

u try reset with samsung reset code see !!!! if not try !

 

[mostafa-oujdi]

thanks my friend; i have already put this code ; but no result!!