If you have an old iPhone 4, there are a few ways to get it working again. Here are three tips:

  1. Reset the phone. This will erase all your data and start over from scratch.
  2. Use a computer to restore your phone. This will take a little longer, but it’s worth it because you’ll have all your data back and be able to use your phone as if it were new.
  3. Use a jailbreak tool. These tools allow you to unlock the bootloader and then use custom firmware or apps on the phone without Apple’s permission.