Solve SAMSUNG Mobile's General problems by hand

First of all, switch off phone and extract SIM Card then press power button to switch on the phone. Now, give the command pressing *2767*2878# For Old Model and *2767*3855# for New Model.

Note: - This method resets phone to default factory mode and can solve general problems e.g. No Network, No Sound, Menu, Display etc; it also removes manually entered security codes and resets to default. Default Phone lock Code is "0000" and Security Code is "00000000". Before you proceeds, please backup your phone memory data because it will erase all phone memory.