How 'bout for calls?
Your roaming service is probably not yet active.
ACTIVATE YOUR ROAMING.
1. Dial *143# (FREE)
>>choose the option for INT'L & ROAMING SERVICES, ROAMING SERVICES
>>PRESS 1 ACTIVATE ROAMING or PRESS 3 TO CHECK STATUS
2. Via SMS
Text GROAM ON and send to 2884.
To activate your roaming service for a specific period Text GROAM ON <START DATE mm/dd/yyyy> <no. of days> to 2884 (i.e. GROAM ON 06/18/2013 27).
****At least PhP 100 minimum balance to activate GROAM.
At least PhP 50 maintaining balance to continue using your GROAM services after activation**