Are you experiencing lags and unusual delays when using your smartphone? Or maybe just want to check if every part of your device works as it’s supposed to? Try using these hidden codes to test various systems inside your smartphone.
*#*#2664#*#*: A USSD code for performing touch-screen tests.
*#*#0*#*#*: Use this code for an LCD test.
*#*#526#*#*: Perform a Wireless Lan test.
*#*#232331#*#*: A code for performing a Bluetooth test.
*#*#7262626#*#*: This code activates a field test.
*#*#0842#*#*: Using this code you can perform a vibration test and a backlight test.
*#*#0283#*#*: A code for executing a packet loopback test.
*#*#0588#*#*: Use this code for a proximity sensor test.
*#*#0673#*#* or *#*#0289#*#*: Both these codes work for audio & melody tests.
#0782*#: A USSD code that enables a real-time clock test.