1.On ur WiFi and Connect it.
2.Make sure u can browse the net by the WiFi.
3.Goto Menu and Open the PLAY NOW
4.Move to the end pages click Location and make sure Phone Model is U1i
5.Choose the Asia Pacific O-V
6.Choose SINGAPORE
7.Click Software the icon i drew a circle
8.Move to end pages then Click Next
9.So u will saw the Facebook Apps then Click Download and install it.Enjoy ur FACEBOOK