Revamped version of the iPhone 3G with faster processing speeds. Repair of this device is similar to the 3G, and requires simple screwdrivers and prying tools. Model A1303 / 16 or 32 GB capacity / black or white plastic back.
The "hotspot" comes from a defective camera - the phone isn't old - so let apple handle problem. those tiny cameras are sometimes very problematic when they are longer in use, the sensor gets hot and will have exactly this problem.