1. Internet browsing on Globe isn't free. It costs PHP 0.15 per kilobyte. On Smart, its P10 for 30 minutes.
2. Go to Globe's site to get the OTA (over the Air) settings to configure your phone for GPRS (or 3G if you have a 3G phone).
I forgot the command on Globe, but on Smart its something like SET GPRS (phone model) and send this text to 211. The telco will repond by sending you OTA settings, then you just save it.
3. Once configured for GPRS/MMS you can start surfing by opening your mobile browser.