13 Secret Codes That Will Unlock Hidden Features on Your Android Phone
1) Firmware: *#1234#
Here is another one for Galaxy users. By inputting this code, you can find out what your phone’s firmware is right now. This is crucial information that anybody who is trying to help troubleshoot your phone will ask. This is also a question that you have to ask yourself if you ever want to root your device as different versions have different root tools that must be used. Try it out!