Globe Telecom is now offering volume-based mobile internet surfing plans with their Globe PowerSurf promo — starting with 50MB for Php99, valid for 30 days.

Here’s the full pricing plan:

Subscribers with Globe Postpaid Plan, My Super Plan, My Fully Loaded Plan, or My Super Circle Plan can avail of this offer except when you are on Load Tipid Plans, Load Allowance Plans, Globe Broadband Tattoo Plans or My SuperSurf Plans.

The service auto-renews after the expiration date so you need to text PowerSurf Off to 8888 if you want to un-subscribe. If you consume your volume allocation before the expiry period, you will be charged the regular Php5/15 minutes rate. SMS notifications are sent out at 50% and 100% usage.

Promo is valid until November 15, 2011.