GPP Sim po ba?
If GPP Sim depende sa iOS version mo. (Nabblock kasi depende sa iOS update)
This is from my memory. Not sure if this is the exact sequence or kung ito na lahat yun.
1) Turn Off Phone
2) Insert GPP Sim and Globe Sim
3) Boot Up
4) Select Globe as Carrier in Menu (Magreboot ulit iPhone then viola!)
Troubleshooting:
If hindi gumana try a different sim (Steps 1 - 4 if globe din ilagay)