First of all extract the file and put file below in micro sd and insert in ur phone then make it ON.
on the first screen u can see the language option and accessibility now go to accessibility
accessibility>switch access>make it on>settings>key combo for overview>press volume down and click ok..
You can see the browser then press volume down >dual WINDOW> click to file manager install the app that you put in micro sd and open it. now you can see the settings than go to backup & reset and reset your phone DONE.
If you can't see reset option on backup & reset than go back than go to users create new user then set it up then come again to owner then go to backup & reset now u can see the reset OPTION NOW u can reset ur phone DONE....
Watch Video Guide Here