The following list is a secret code has been tested on galaxy s4 and works well.
* # 0228 # Battery status (RSSI reading,ADC)
* # 0011 # Service Menu
* # 1234 # to check the software version of phone.
* # 0228 # Battery status (RSSI reading,ADC)
* # 0011 # Service Menu
* # 1234 # to check the software version of phone.