Zong GPRS/ EDGE Settings For iphone (3g, 3gs, 4,4s, 5)

in iphone Go to Settings > General > Network> Cellular Data ON      And > Cellular Data Network
APN   : Zonginternet
User Name : _________
Password:   _________

And Save this And enjoy GPRS / EDGE in iphone . I have iPhone 3GS And Internet Is Working.