Some cool iPhone codes to increase your phone knowledge (7 Pictures) Posted on September 12, 2016 Block Caller ID 1 Get a more precise signal strength. 2 Get your phone’s unique IMEI. 3 Find out where texts go. 4 Call Barring 5 Call Waiting. 6 Call Forwarding. 7 email facebook linkedin twitter reddit google+ pocket Buttons by RRSSB