1.* 2767 * 3855 #: Dialing this code will reset your phone. Phone memory will be deleted. Use this code only if you need it. Otherwise your phone's data may end.
2.* # * # 2664 # * # : With this code you can test the touch screen of your phone whether it is working properly or not.

1. * # 34971539 # * # : This code gives complete information about the phone's camera.

2. * # 4636 # * # : With this code you can know the full details of the phone. For example, you can get many more information including battery, mobile details, Wi-Fi information, app users.

3. * # 0842 # * # : This code allows the vibration of the phone to be tested.

4. 21 #: From this code you can know that your messages, calls or any other data are not being diverted elsewhere.

7.* # 06 #: With this code you can know the IMEI number.
8.* # 62 #: Sometimes your number speaks no-service or no-answer. In this case, you can dial this code in your phone. With this code you can help you know whether your phone has been re-directed to any other number or not.
9.## 002 #: With the help of this code, you can deactivate all the forwarding of Android phones. If you believe your call is going to be diverted somewhere then you can dial this code.
10.* 43 #: With the help of this code, you can turn on the call waiting service in your phone, while dialing # 43 # and also shutting it down.