To remove pattern lock on Samsung Glaxy i9500 S4 cellphone without Google account or box we use simple key combination method to reset device to factory default settings known as hard reset. Please make sure your mobile battery is charged 70% before doing that and take backup of your mobile data on mobile memory because this method will remove all data on mobile memory. Here some instructions are given to reset mobile via key combination just follow these instructions step by step.
i9500 S4 Pattern Lock Problem solved
Power off mobile 
Press and hold Volume Up + Home and Power Keys together 
Select (Wipe data/ factory reset) option with volume down and press power button one time
select (Yes___Delete all user data) with volume down key and press power button
When formatting complete press power button to reboot mobile

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