Zeetron Iphone 4 / 4s 5 5c 5s Pentalobe Torx 5 Star Screwdriver (At&t Verizon Sprint Tmobile All Carriers)
This is the iPhone bottom screw driver. Some iPhones are sealed with a special screwdriver. It looks like it has 5 stars on it. This si what you need. This is common on Verizon, and the 4S. The item comes with a zeetron microfiber cloth as well