Getting the model and storage right sounds obvious, but it is one of the most common seller errors. The difference between 128GB and 256GB, or between a Pro and a Pro Max, can materially change the quote. If you guess, you are effectively asking to be re-priced later.
Practical guidance: this guide focuses on the checks and decisions that most often affect value, payout speed and sale certainty for UK iPhone sellers.
Why accuracy matters here
Used-phone pricing is built on exact specification. A buyer is not paying for “an iPhone 13-ish”. They are paying for a specific model, capacity, colour and condition profile. If you choose the wrong variant, the quoted price may look great – right up until the phone is inspected.
The simplest way to protect yourself is to confirm the details from the handset, not from memory.
How to check the model properly
On the phone, go to Settings > General > About. That gives you the model name, storage and serial details in one place. You can also compare the model number against Apple’s published identifiers if you need extra certainty.
If the phone no longer powers on, check the original purchase record, box label if you still have it, or any account record that shows the exact device.
The wrong model or storage selection is one of the easiest ways to turn a smooth sale into a needless re-quote.
Storage: do not guess from what you were using
Many people accidentally describe the storage they wish they bought, or the storage they happen to have free, rather than the storage the handset actually has. A phone with 20GB free space is not automatically a 64GB phone. Likewise, having “loads of photos” does not make it a 256GB model.
Always use the reported specification, not an estimate based on usage.
The best pre-sale habit
Before taking any quote, write down or screenshot the exact model and capacity. Then use that same reference each time you compare offers. That one-minute habit removes an enormous amount of avoidable friction.
The boring details are what make the payout predictable.
Why basic model mistakes cause unnecessary requotes
Small identification errors create surprisingly large admin problems. Getting the storage wrong, confusing one model generation with another, or quoting the wrong network or colour can make a buyer question the whole submission. Even when the error is honest, it slows the process because the quote has to be revisited and the transaction becomes less straightforward than it should have been.
That is why the best approach is to verify the handset from the phone itself before you quote. Check the model name, storage, IMEI, and any obvious warnings in settings, then compare that to what you enter online. A careful two-minute check at the start saves much more time than an apologetic correction later.
- Read the device details from settings, not memory.
- Use the IMEI as a private verification point.
- Double-check storage before submitting your valuation request.
Quick answers
Where do I check model and storage?
Settings > General > About is the simplest place on a working iPhone.
Can the wrong storage choice affect price much?
Yes. Storage differences can materially change the quoted value.
Should I just pick the closest option?
No. If you are unsure, confirm the exact specification first.