The configuration that I used to make it work are the following:
- APN: weroamplan
- username: pldt@weroam
- password: pldt
- number to dial: *99#
- authentication method: PAP (or sometimes CHAP)
- allow BSD data, Deflate data and Header data compression
- IPV4 Settings: automatic PPP address only, add 126.96.36.199 (GoogleDNS) as your DNS server.
As for those who are having troubles configuring their dongles to work, might I suggest to search over my previous blog posts on some of the guides I have written for it.