For the two bottom security screws.
Since official Apple Stores typically do not service the iPhone 4 anymore, you will need to rely on independent retailers: buy iphone 4 battery locally
Local shops may charge a small service fee, but some may refuse the job due to the risk of damaging aged internal ribbons. For the two bottom security screws
Report: Purchasing iPhone 4 Battery Locally (April 2026) Finding a replacement battery for the iPhone 4 in 2026 is a challenge due to the device's age. Most authorized centers no longer stock parts for this "obsolete" model. However, options still exist through specialized local shops and DIY kits. 📍 Local Availability & Where to Look buy iphone 4 battery locally