Procedure Customer can subscribe welcome back offer by dialing *117*70# from Jazz WiFi Device App or 192.1681.1.1 portal (USSD section). Offer availing customer can check usage by dialing *6363# and going to option 4. 6363 Menu is accessible from Device & Jazz Prepaid SIM. Offer usage threshold notifications will be sent to MBB nos. and OCN (all OMOs).