This is a induction flex cable for the iPhone 4. This cable includes the proximity sensor. If your iPhone 4 is not disabling the touch panel when the iPhone is put up to your ear, you may need this replaced.
For over 13 years, Powerbook Medic has been providing parts, repair, and service for a variety of gadgets. In that time, over 300,000 orders have left our facility for US and international destinations to help save old devices from the landfill and bring them back to working condition.