My first iPhone had the power button stuck. At the same time new iphone 4S was out and I bought new one. Now i decided to fix it and use it as a backup phone.
Although I was afraid to open and if I will manage to do this. I was afraid that the wifi or GSM antena will not work or blow a circuit... after reassembly, it was nice to see the whole thing work like a charm. The photos and guides were helpful and I wish I had the patience to take some photos.
Be brave and do it. Take photos. I am going to repair a screen for another phone next, and I am sure I will take the photos!!!. Patient and read through instructions before diving in to fix the phone