bought ip6 in ksa got in the philippine cant use it.

Apple lists Globe and Smart as carriers that support iPhones in the Philippines.

Besides that, the phone may be locked to a specific carrier, as part of the deal. If that is the case, then only your carrier can unlock your iPhone. How to unlock your iPhone for use with a different carrier - Apple Support

If it is carrier locked, only the original carrier can unlock it, if you qualify. Nobody here can help you, sorry.

Regards

Giulio

Please post the exact error message (if you can: a screenshot). “Can’t use it” may not be descriptive enough.