can i use any time my iphone 4s in philippines?

Where did you get the iPhone? Is it locked to a particular

wireless carrier?

How have you tried to use your iPhone in the Philippines? What

is the exact wording of any error message you received?

Were you using it there previously?

If you want help you really need to be more proactive in the way you ask questions. You've stated nothing that would help anyone even being to guess what issue you're having.