VoIP

Dear Sir / Ma'am, We are an online company based here in Taiwan and have variety of clientele around Asia specially in China. We are having problem recently calling our client especially in China, so we are planning to acquire a VoIP Philippine number. Now my questions are do we need to be a registered business entity in the Philippines or no need. If no need to register in the Philippines, we would appreciate if you could send us your VoIP service quotation thru email, thank you.