Zong 4G presents an exciting internet package with very fast internet speed, named as Zong Data Sim Monthly 4G Internet Bundle offer. With this internet bundle you can enjoy 4 GB internet data for browsing, Facebook, Whatapp,Twitter and You Tube with very high speed on and on for a month. The validity for this package is 30 days. You can subscribe and unsubscribe it by dialing *6666#.