My iPhone 4 was not holding a charge. Old phone but did not need a new phone that would cost over $700 dollars. Old school... really like my phone and not interested in upgrade.
The replacement of the battery was very smooth as all of the tools were included with the battery including new screws. Tips of screw drivers were the key to the easy removal of the tiny screws, magnetic tips held the screw in place and easy to insert screw back into phone. The plastic removal tool to wedge the battery out of the phone was also a key, the battery is glued to the phone, but a gentle pry with the removal tool made it come out of the phone.
I watched the video on the Website and followed the directions which made it go very smoothly, I paused the video with each step, completed the step and moved to the next step.
Watch the video on the Website as it offered a step by step process to make the change. If you like your phone and don't want to pay for the now expensive upgrades, spend $20 bucks and get a new phone. My phone now holds a charge, it was not holding a charge for 3 hours before.