The master number is your mobile number, you can get usage notifications on this number and also if your master number is Zong number then you can also subscribe bundles and recharge for your MBB number.
You can dial *6767# from your Master number or *6363# from your MBB number device interface i.e. 192.168.8.1 and subscribe or Unsubscribe any bundle.
Yes you can subscribe to a monthly bundle. If you will subscribe to a 3 month bundle while you already have a 3 month bundle activated then the new bundle will cancel the previous bundle resources.
Visit the device vendor’s Service center or visit nearest Zong CSC.
Zong 12 Months MBB – 75GB (Device Only Package)
Zong 12 Months MBB – 75GB (Device Only Package) pak24tv.com