What iphone is best for someone who lives in Haiti?

I wold like to get an iphone for a birthday present for someone who lives in Haiti, so I can't ask him which one would be best to get. I don't know anything about iphones. Do some work better in Haiti than others?

Xiaomi cost 1/3 the price and is just as good.

Don't be silly. They barely have electricity in Haiti - let alone phone reception.

Get them a real useful gift, or give them the cash to buy their own.

Find out what networks are available in Haiti. The phone itself doesn't really matter too much.

I'm not being silly. I know that iphones are something Haitians like and use- I was told that by a Haitian. However, I'm not able to ask that person what is the best kind of phone to get.