
Few things are more cringe-inducing than an iPhone 4 or 4S user finding his phone’s back glass panel shattered. And though a broken battery cover can be hidden by a well-chosen case, if you’re selling your phone on eBay or to a friend, you’ll want to tidy up the device as much as possible beforehand.
Luckily, the back glass panel on an iPhone 4 or 4S is the easiest thing on the phone to replace. All you need is a replacement panel and the correct screwdriver.
iPhone 4/4S panels are cheap, too. eBay has them for around $8, an entire kits with the appropriate screwdrivers are $15. Amazon has them, too.
Getting Started
Your road to recovery begins by answering a few simple things:
1) iPhone 4 or iPhone 4S?
2) If iPhone 4, is it a GSM (AT&T) model, or CDMA (Verizon)?
3) If iPhone 4, is the battery cover held in place by Phillips or Pentalobe screws?

