Most apps still work, but within 1–2 years, many may require a newer OS.
If your budget allows, consider these newer models which support the latest iOS:
Slightly newer, but also nearing the end of update support. iPhone 11: Much better battery life and a faster processor. iphone x where to buy
Check that the "Maximum Capacity" is above 85%. If not, you may need a $89 battery replacement.
The cheapest way to get a modern chip and 5G support. Most apps still work, but within 1–2 years,
The iPhone X cannot run iOS 17 or iOS 18. It is stuck on iOS 16.
A leader in refurbished tech with a 1-year warranty. Most apps still work
The gold standard for used phones. Staff manually review listings to prevent scams.