Did you try switching your phone to airplane mode? and also, try to change the APN setting by resetting it to default.
Or maybe, if you're on prepaid, I think it would require you to have at least 5.00 pesos load credit.
Is that your first time to encounter the issue?
What specific device you are using?
Did your APN settings has been set to default?
Globe Prepaid APN: http.globe.com.ph
Globe Postpaid APN: internet.globe.com.ph
How about calling 211 using your Globe/TM handyphone?