Useful gsm codes.
1) * # 06 #. Allows you to find out the unique IMEI number of any smartphone, including the iPhone.
2) * # 21 #. Allows you to get information about the enabled call forwarding - calls, messages and other data. Very handy when you want to check if someone is spying on you.
3) * # 62 #. With this command, you can find out to which number incoming calls are forwarded if the iPhone is turned off or out of network coverage.
4) ## 002 #. Disables any call forwarding. Thus, only you will accept them.
5) * # 30 #. Provides information about identifying the incoming subscriber number
6) * # 33 #. Shows information about blocking outgoing supported services such as calls, SMS and other data.
7) * # 43 #. Displays information about call waiting.
8) * 3001 # 12345 # *. The so-called "James Bond" menu: here you can find information about the SIM-card, and the signal strength of the cellular network, even there was a place for indicators of cellular signal reception. All data, by the way, is promptly updated.
