Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.
It might be a battery problem if it gets hot and stays hot after it's been turned on. Try opening it up and seeing if the battery is bulged or looks weird.