I know you're very excited to acquire the best and the latest iPhone Apple has manufactured. I'm currently in the same state as you but as of now, iPhone 6s series are still not officially launched in the Philippines but to give you a tentative date, I think GLOBE will release it in mid-November and open its pre-order pages at the end of this month. Last year, this is their timeline and likely to be the same this time.
Check this out How to Pre-order Your iPhone 6s/iPhone 6s Plus from Globe to learn more about it. Also, the iPhone 6s Order page is now available iPhone 6s and 6s Plus | Offers | Postpaid - Globe.
Hope this helps.