If i buy an iPhone in America will it work in the Philippines?

I'm planning to buy an iPhone in the US since it's cheaper there but I'm wondering if it will work here or it will only work with American networks such as at&t, Sprint or Verizon.

I think it can work anywhere because the iphone has 2 smart antennas that can switch between carries

The only iPhone that will not work in the Philippines is the iPhone 4 from Sprint or Verizon.

All other iPhones work on the GSM networks used in the Philippines.

will my iPhone 5s work in the philippines, if so what do i need to do to get it working, someone said just take it to a shop in the Philippines and they will switch out the sim card can someone please let me know thank you

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