Again, you do NOT need a static IP, when you have a domain name.
A domain name is usually cheaper than a static IP!
For PLDT, static IP is ONLY available for biz packages, which are much more expensive than the normal home packages.
For Globe, a static IP cost 900 pesos/month.
A domain name cost just below $10 in a YEAR, so its much cheaper.
A domain name is all you need to use your dynamic IP.