[Q] micromax a110 dual sim problem after jb upgrade - Micromax A110

i have upgraded micromax a110 to jelly bean my tmobile 3G usa and vodafobne 3g sim from delhi under roaming, both were working fine.. when i came back last week to new delhi , and tried airtel sim 64 k(up east) it was not working in either slot while voda sim working very fineā€¦. when i tried that in up west circle airtel was workin as well as bsnl was working. when i gone to up east circle airtel again stopped working as well as bsnl 3g sim ( 128kb ) . all other companies sim are working in this handset except airtel . i tried this but airtel not wrking and bsnl start working in one slot other slot was not working in kolkata yesterday...
pl suggest the remedy

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