Step 1:Install 'Kingroot' & click 'try to root' & root your phone.(You do not need to worry,you can unroot it later on).It hardly takes 15 minutes.During rooting,phone might reboot several times,which is normal.Now you will find that the root is done.
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Step 2:Install 'Lucky Patcher'.You do not need to update.Hold the 'fake gps go' app which you have downloaded.(do not click & leave,just hold the app).You will find a popup where there is an option 'move to system/app'.Click that & select 'yes'.Phone will reboot.
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Step 3:Open 'Kingroot' & uninstall it(there is an option in the settings).Now your phone is unrooted.
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Step 4:Open the 'fake gps go' app.(Make sure 'allow mock location' is switched off in settings).Then swipe the screen for more options(from left to right).Switch on 'root mode'.Now select your desired location & start the 'fake gps go' app(ignore adds,after you start).A joystick will appear.
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Step 5:Open PokemonGO.Use the joystick to move your character.Happy PokemonGo-ing!
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NOTE:
1) You have to root your phone & after 'Step 2' you must uninstall 'Kingroot'(& it'd automatically unroot).If you donot then PokemonGo will not open.
2)Do not update 'Lucky Patcher' & you must hold & not just click the 'fake gps go' app & then select the 'move to system/app' option.If you just click it & select it it won't work.
3)Must switch on 'Root Mode' in 'fake gps go' app's options(which is very important).
4)Select nearby locations & do not teleport to distant places if you want to avoid a soft ban.