HOW TO VERIFY WHEN A SMARTPHONE WAS FIRST USED BY ANDROID DEVICES, INCLUDING SAMSUNG GALAXY AND LG OPTIMUS G SERIES ON SOUTH KOREAN CARRIERS SKT, KT AND LG U PLUS

*This is crucial because manufacturer and telecommunications company warranty is valid for a year from the day it was first used to make a call, rather than manufactured date .

 

[ ON SAMSUNG ELECTRONICS GALAXY SERIES ]
  1. turn ON smartphone,
  2. open screen to make a call,
  3. enter numeric key pads : 319712358
  4. when the phone will automatically switch to Hidden Menu :
    where your dedicated carrier will show up on top bar
    (South Korean cell phones used to be carrier-locked within South Korea, and unlocked for use abroad, but from the smartphone age : this came to be inter-changeable)
  5. you will be prompted to input password for appropriate carrier so enter :
    for SKT : 996412 ／for KT : 774632 ／for LGU＋0821
  6. where Debug Menu will appear, then select System :
  7. and click on First Call near the bottom 😉

 

[ ON LG ELECTRONICS OPTIMUS G SERIES ]
  1. turn On smartphone,
  2. enter in order : 5457 # * (your model number)
    for example, if using LG G Pro whose model number is LG 240S :
    enter : 5457 # * 240 or on G3 whose model number is LG 260S :
    enter : 5457 # * 260
  3. then Debug Menu will appear automatically
    *with your dedicated carrier name (such as SKT, KT or LG U＋)
    appearing for a couple of seconds towards 2/3 down the page .
  4. here push on [Menu Key] on bottom right,
    ( for LG G3 series which does away with soft buttons up-front :
    add # after the model number in this case 400 #
    or for Cat.6 : 460 # then press volume-up button on rear )
    and the First Call Date will pop-up in the center !

 

 

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