I have two airtel sims one is tata docomo (3g sim)(90xxxx) and the other is airtel 4g sim(82xxxxx). I want to interchange the sim. Basically I mean I want tata docomo number(90xxxx) on airtel 4g sim and airtel sim number (82xxxxx) on tata docomo sim as I want to recharge a data pack in my sim but I came to know that 3g has been shutdown in Lucknow so I get only 2G coverage. Can anyboday try this and give me whether it happens or not?? I cannot try as if something happens to this number I cannot order cooking gas from it so I am in a big soup.