A Ufone Blaze Master Number is simply the alternate contact number from any other network (Jazz, Zong, Telenor, etc.) With the master number, you can recharge your Blaze MBB device and do other necessary things about the device and packages. But if the master number is your Ufone number then you can subscribe to the MBB bundles, check remaining MBs, check remaining status, and check usage details by dialing Ufone USSD Code *3045#.