source https://bsnlteleservices.com/bsnl-4g-sim-card-free/
Now Upgrade to BSNL 4G SIM Card at Free of Cost
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June 24, 2020
June 24, 2020
The competent authority of Bharat Sanchar Nigam Limited has decided to offer BSNL free 4G SIM for upgradation/ swap/ replacement of 3G/2G SIMs with new upgraded USIM in the areas/ Secondary Switching...
source https://bsnlteleservices.com/bsnl-4g-sim-card-free/
source https://bsnlteleservices.com/bsnl-4g-sim-card-free/
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