If your iPhone 4 won’t charge, there are a few things you can do to try and fix the issue. First, make sure that the battery is fully charged. If the battery is only partially charged, it may not be able to accept a charge from the iPhone 4’s charger. Next, try using a different charger. If you’re using an original Apple charger, make sure it’s compatible with your iPhone 4. If you’re using a third-party charger, make sure it’s compatible with your iPhone 4 and has a voltage of 5V/1A or higher. Finally, if none of these solutions work, you may need to take your iPhone 4 in for repair or replacement. ..
