Method 1: (Choose a network operator)
Go to settings>>>more>>>Cellular>>>Network Operator
Mag manual searching yan tapos wait mo lang pag lumabas na ang network piliin mo yung Sun 3G wag yung naka ALL CAPS SUN 3G.
Tapos magregister na yan sa Sun network then try mo open ulit ang data mo kung meron na.
Method 2:
Dial *#*#4636#*#*
click Phone Information
Hanapin mo
Set Preferred network type:
Set mo sa WCDMA only
May balance ba? kung matagal ng zero balance yan try mo lagyan ng atleast 5 or 10 pesos load then check mo kung bumalik na ang data...kapag ayaw pa din try mo i text NET to 2300 (wait confirmation to activate internet service).