Sometimes when you need the most they fail. Instead of having your Iphone service in Greenhills, I think it would be better to check this listing below for a possible much better Apple Authorized Service Center. No worries and less hassle in my Experience. Best way to have your Iphone , Ipod, Ipad repaired.
Apple Authorized Reseller
And Service Center
4th flr 1st Life Bldg.
#174 Salcedo Street, Legaspi Village, Makati
Or you might want to get hold of this..
If you got your Iphone at Globe. Head on to their business center. I think they shipped your unit in singapore for possible repair.