For the benefit of everyone, different mobile networks require different APN (Access Point Name) settings. These APN even vary depending on whether you're on postpaid or prepaid.
APN Settings for Globe
Postpaid APN: internet.globe.com.ph
Prepaid APN: http.globe.com.ph
APN Settings for Smart Bro
Postpaid APN: smartbro
Prepaid APN: smartbro
APN Settings for Smart Buddy, Smart Gold
APN: internet
APN Settings for Sun Cellular
Prepaid
APN (static): minternet
Authentication: PAP
IP address: dynamic
Postpaid
APN (static): fbband
Authentication: PAP
IP address: dynamic
APN Settings for PLDT WeRoam
Postpaid: WEROAMPLAN