Mostly the way in which they can restore the factory settings to the phone is perhaps one way, so we invite you to read every article on our site carefully and focus in order to your phone does not display any danger at all.
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How to Hard Reset Samsung X150
Reset Via Master key
Start by turning your device on, to do it press Power button.
Then dialling screen of your device type this code in dialer: *2767*3855#
Next on confirm whole Factory reset process by tapping Call key again.
Now your phone should reboot.