If you live in the USA, you can get a brand new iPhone 11 from straight talk for $199, buy one month of service for $45, let the month expire without renewing, and after 61 days from activation it will be unlocked and available to use in any carrier.

Bought a refurbished iPhone 12 on amazon. Not even a year later the screen doesn’t work properly and the battery went from 90% to 70%. I will never buy refurbished again. Especially from Amazon. 500 bucks I’ll never get back.