You may or may not be aware that Android OS (as do most mobile operating systems) have built in dialling codes that allow you to activate a number of hidden features and settings that you can use on your device. There are many reasons as to why you would want to use these codes.
One reason for me is to do some diagnostic testing in particular using the *#9900# which is a powerful tool. None of the codes I’ve highlighted in this post can cause any damage to your device, however if you don’t know what you are doing, don’t blame me if something goes wrong! 🙁
IMPORTANT NOTE: I’ve tested all these codes on the Samsung Galaxy GT-I9300 running Android 4.1.2 rooted. The build version is JZO54K.I9300XXEMC2. Now let’s have a look at some of the more popular dialling codes for the Samsung Galaxy S3. These codes will only work with this mobile device. Worth remembering, your S3 doesn’t require rooting for these dialling codes to work.
Open up the phone app as you will need the dialling pad to input these codes:
*#06# – Displays your device IMEI number
*#1234# To check Software and Hardware information, PDA, CSC, MODEM (Firmware Version)
Note: If you use SuperSU you will be taken to the apps screen, just TAP the back button
*#2222# H/W Version – enters ServiceMode
*#0011# Displays status information for the GSM network you are using i.e. HSPA
*#232338# WLAN MAC Address – you can also enable or disable power saving mode from here too
*#7353# Quick Test Menu – you have 12 options including testing Melody; Vibration; Speaker; Dimming; Camera; VT Camera; Bluetooth; TSP Dot Mode; TSP Grid Mode; Accelerometer Sensor; Proximity Sensor and Light Sensor
*#0782# – real-time clock test – tap back button to exit
*#9900# – Allows you to collect system dump data – you can run dump state/logcat/modem.log; delete dumper state/logcat; run dump state/logcat; copy kernel log to SD card; run CP based log; run Forced CP crash dump; copy to SD card/include CP RamDump; Debug Level Disabled/LOW; Low battery dump – Off; Silent Log – Off; TCP DUMP START; Enable SecLog (currently disabled); Exit
Note: If you use SuperSU it will prompt you to grant superuser access
There are many websites that present these codes, but I found many posters just copied and pasted without testing them. I have tested all of the above and know they work on the Samsung S3 International version. if any of you have tested other codes that might be useful to our readers, please let me know.
Safe surfing folks!