steps to prepare cell phone screen replacement and mobile phone batteries

are background battery broken business cell cellphone changing checker close closeup coming communication component customer customers damage damaged desk device devices digital electronic equipment fix fixing gadget going hand handwork hardware has his holding human iphone maintenance man mobile mobilephone ndamaged nmobile not notebook object owner part people phone placed preparing process quality repair repairers repairman replace replacing results screen screwdriver service shop table technician technicians technology test testing that there tool touchscreen white working