Which Used iPhone Should You Buy in 2026? A Model-by-Model Guide

The used iPhone market in 2026 is huge, and it is not flat. An iPhone 12 and an iPhone 15 can look almost the same in photos, yet one has years of software updates left and a USB-C port, while the other is close to the end of its support and may be on its second or third battery. Choosing the right generation matters more than choosing the right color or even the right storage size.

This guide walks through every iPhone generation you are likely to see second-hand — from the iPhone 11 to the iPhone 17 family — and explains what changed, what tends to go wrong, and which checks matter most for each one. At the end you will find a comparison table and a short verdict for different budgets.

How to think about a used iPhone in 2026

Three things decide whether a used iPhone is a good buy, and the model year affects all of them:

• Software runway. Apple typically supports an iPhone with major iOS updates for around five to six years, then with security patches for a while longer. A phone that drops off the iOS support list still works, but banking apps and messaging apps eventually require newer iOS versions. Check Apple’s current compatibility list for the latest iOS release on support.apple.com before you decide.
• Battery wear. Older phones have simply lived through more charge cycles. A low battery is not a deal-breaker — a genuine Apple battery replacement is routine — but it must be priced in.
• Lock and region traps. From the iPhone 14 onward, US models have no SIM tray, and many used iPhones in every market are still carrier-locked. These are the issues that turn a bargain into a drawer phone.

Keep those three in mind as you read each generation below.

iPhone 11 family (2019): cheapest, but the clock is ticking

The iPhone 11, 11 Pro and 11 Pro Max are the oldest iPhones most buyers should still consider. They have Face ID, a physical SIM tray plus eSIM, Lightning, and the A13 chip, which still handles everyday apps well. The standard iPhone 11 uses an LCD; the Pro models use OLED.

• What to watch: batteries on these phones are frequently below 80% capacity or already replaced with non-genuine cells. Face ID failures after drops or water exposure are common.
• Software: the iPhone 11 family is among the oldest models on recent iOS releases, so it will be among the first dropped. Buy one only if the price reflects a short remaining runway.

iPhone 12 and 13 (2020–2021): the value sweet spot

The iPhone 12 brought 5G, an OLED screen on every model, flat edges, MagSafe and the tougher Ceramic Shield front. The iPhone 13 kept the design but added noticeably larger batteries, a 128 GB starting storage and, on the 13 Pro and Pro Max, a 120 Hz ProMotion display.

• iPhone 12 mini and 13 mini are lovely small phones, but their batteries are small too. Expect weaker battery life on a worn unit.
• iPhone 12 base storage is 64 GB. In 2026 that fills quickly; prefer 128 GB or more.
• Screen swaps are common. Many 12 and 13 units have had third-party screens fitted. Check Settings › General › About › Parts and Service History for “Unknown Part”.

For most budget buyers, a clean iPhone 13 with a healthy or freshly replaced genuine battery is the best value in the whole market.

iPhone 14 (2022): the eSIM-only turning point

The iPhone 14 looks like a 13, but there is a major difference: every iPhone 14 sold in the United States has no physical SIM tray. It works only with eSIM. Models sold in most other countries kept the tray. The iPhone 14 also added Crash Detection and Emergency SOS via satellite, and the 14 Pro introduced the Dynamic Island and a 48 MP main camera.

Why this matters for buyers outside the US: a US iPhone 14 is fine if your network supports eSIM and the phone is unlocked. If your carrier only offers physical SIMs, the phone is useless to you no matter how cheap it is. Read our guide to using a US iPhone abroad before buying one internationally.

iPhone 15 (2023): USB-C and better battery reporting

The iPhone 15 family replaced Lightning with USB-C, gave the Dynamic Island to every model and moved the base model to a 48 MP camera. The 15 Pro and Pro Max switched to titanium, added the Action button and support faster USB 3 transfers with the right cable.

A quieter but very useful change for buyers: from the iPhone 15, iOS shows the battery’s cycle count, manufacture date and first-use date under Settings › Battery › Battery Health (on recent iOS versions). That makes it much harder for a seller to hide a heavily used phone. The 15 Pro models are also the oldest iPhones that support Apple Intelligence features.

iPhone 16 and 17 (2024–2025): newest, priciest, least risky

The iPhone 16 family added the Camera Control button and Apple Intelligence support across the range. The lower-cost iPhone 16e, released in 2025, uses Apple’s own modem and drops MagSafe — easy to confuse with the iPhone 16 in listings, so confirm the exact model. The iPhone 17 line-up (iPhone 17, iPhone Air, 17 Pro and 17 Pro Max) arrived in late 2025; the iPhone Air is eSIM-only, and Apple expanded eSIM-only models to more countries with that generation.

Used 16 and 17 units are often only months old and may still have Apple warranty or AppleCare. Confirm it with an iPhone warranty check — remaining coverage is real value and should be reflected in the price. Because these are the newest models, they are also the most popular targets for theft and financed-then-sold scams, so the checks below are not optional.

Generation-by-generation comparison

Outside the US, iPhone 14 to 16 models usually still have a SIM tray. The model number in Settings › General › About tells you which regional version you have; tap it once to reveal the “A” number, then compare it with Apple’s identification page.

The checks to run on any generation

Whatever model you settle on, the same five checks catch almost every serious problem. Our 15-point used iPhone checklist covers the full hands-on test; these are the record checks behind it.

1. Read the IMEI from the phone itself — dial *#06# and compare it with Settings › General › About and the SIM tray (if there is one).
2. Confirm model, color, storage and Find My. A Model + Color + Storage + Find My check proves the listing matches Apple’s records and shows if Activation Lock is still on.
3. Check the blacklist. A GSMA blacklist check reveals lost or stolen reports shared between networks.
4. Check carrier and SIM-lock, especially on US eSIM-only models.
5. Check replacement history. The replaced status check shows whether Apple swapped the original device — useful when a box and phone don’t seem to match.

Then look at Battery Health and Parts and Service History on the phone; our battery and parts guide explains every status. If you want to see what any lock means in practice, the iCloud check page has the details.

Verdict: which used iPhone should you buy?

• Tightest budget: iPhone 12 or 13 with at least 128 GB and a genuine battery above 85%, or a fresh Apple battery replacement.
• Best balance of price and lifespan: iPhone 14 (with a SIM tray if you are outside the US) or iPhone 15. The 15 adds USB-C and honest battery data.
• Longest support: iPhone 16 or 17, ideally with remaining warranty — but insist on proof of ownership.
• Avoid: any locked US eSIM-only model if you are abroad, any phone with Find My still on, and any iPhone 11 priced like a 13.

Before you pay, run the full report set for the exact phone in your hand: