Upgrade Your Zong 3G SIM to 4G and Get 1GB Free Internet | InfoZonePK

Zong4G-SIMUpgrade

Zong has offered for all those customers who are using Zong 3G SIM right now can upgrade their SIMs to 4G and get free 1GB free Zong Internet for free with the validity of 30 days.

Zong has said, all such customers can upgrade their current 3G SIMs to 4G by visiting Zong customer service centers or requesting it via Online by visiting this page.

Zong customer can check weather current SIM is 3G or 4G by dialing *46#.