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Method 1
> In the dialer , type- *#197328640# or *#*#197328640#*#* ( me deken 1k weda karai aniwa )
>You will be prompt into the Command mode, On the screen provided , Select on Common , normally option 6
> Now Select (FTM) Option 1
>FTM is for debugging and testing .,(Field Test Mode)
>If (FTM) is on, you will have to turn this OFF
>As soon as your turned this off your NULL or altered IMEI number will be restored
>(Important) Without leaving the Command screen press the Menu key, the button that’s found left of the Home button .
> Select Key input and enter option 2. In this case you want to turn it off
>Wait for a minute , this will turn your FTM OFF
> Remove your battery and sim card for 2 minute
>Place your battery inside you Samsung galaxy Phone,
(important) do not place your sim card in
> When the phone is booted, enter the command mode again dial – *#197328640#
>Select the Debug Screen , normally option 1
>After that, select phone control, option 8
>Click on nas control , option 3
>Now, on the screen provided, click “RRC(HSDPA) ,option 5
>To Fix not registered on network or Null IMEI # , click RRC revision , option 2
>Now, click on the released your phone is , here we will choose option 5 (HSDPA only)
>Final step to fix Null IMEI not registered on network for Samsung Galaxy is to turn off your phone then insert your sim
or
>Insert your sim card then reboot your phone
Method 2
>Dialer
>Enter this code
>*#*#4636#*#*
You do not need to press send button, it will automatically appear the Service mode
>Enter Service mode
>Click on the top option, -Device information or Phone information
>Click on Run Ping test
> At the bottom of this screen you will see
>turn off radio/or on radio
>Click on the Turn Radio Off button
>Your phone will prompt you to restart
>Click reboot
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