Our old iPhone is used by the kids for games, music and pictures. But kids don't always take care of their things.
So when our 6 year old couldn't charge her phone anymore, we looked for a way to fix it. I found the docking replacement and step by step instructions at ifixit.
The repair was clearly explained. Although, iPhones can be complicated, the instructions provided by ifixit were perfect. This was my first time opening and fixing an iPhone and it was great!
My advise would be to make sure you go through the instructions and video demonstration before attempting any repair. This will ensure that you don't waste time.