How to upgrade your old Airtel sim to 4G




Request for your Free 4G SIM

after you receive the sim you can find 20 digit sim no on the back side of sim packet
or sim itself 



send sms to 121 message as followed

SMS YOUR20DIGITUNIQUESIMNUMBER


you will get a message press 1 send to confirm 


you will get a confirm message ,Now you have to wait until your network goes down  ,after network goes down you can swap with your NEW 4G SIM 


go to settings and change your network to 4g 



Enjoy 4G :) 

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