A good guide. Got the assembly from iFixit, and the guide walks you through this pretty easily. When I finished, the phone was stuck on the logo screen and flashing red. Some research and a forum answer pointed to the flex cable/front camera unit. I swapped out the newer unit for the one from the old phone and it booted right up. Except for that little hang up, all went well.

Great guide. The phone I was working on was a refurb unit supplied by AT&T and the adhesive on the battery was more like glue. No tabs. Took heat, the card, and patience to get it out.