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Continue to ChatGPRS Activation and Deactivation procedure for BSNL Postpaid connections https://sunish.net/2007/11/16/gprs-activation-and-deactivation-procedure-for-bsnl-postpaid-connections/
GPRS Activation and Deactivation procedure for BSNL Postpaid connections https://sunish.net/2007/11/16/gprs-activation-and-deactivation-procedure-for-bsnl-postpaid-connections/