iPhone 3G LCD & Touch Panel IP-2342 Reassembly Directions. The iPhone 3G Touch Panel is also known as the Glasstop, Digitizer and Touch Screen. These are all the same part and are available at These are step by step on how to re-install the iPhone 3G Touch Panel/LCD for Part IP-2342. This is part of the complete guides to taking apart your iPhone 3G and Smartphone units. For 5% off your first order on our webpage use coupon code YOUTUBE at checkout for a limited time only.