Phone carrier byod offers during thanksgiving

Hello, got a new unlocked Iphone and curious to know best deals from phone carriers for byod devices to get new clients .

I prefer unlocked phones as need to travel internationally sometimes and prefer using the same phone. Currently have a plan from Mint mobile where I paid $240 per year for 15gb monthly dat.

I saw some from Verizon and Atnt a they were underwhelming.

Thanks