Cell service questions

I'm off to Manila next week and was planning to get a local SIM card with data and call/texting at the airport once I get there.   After a week in the Manila area I'm heading to Palawan for 6 weeks.  My question, will the service I buy in Manila work in Palawan as "local" or am I facing roaming charges once I get to Palawan?

Second question, which company has the best coverage in Palawan, Globe or Smart?

Thanks in advance for any guidance provided.

It will work fine but I don't know which one is better in Palawan. I used Globe.