Apple has not announced the iPhone 18 Pro yet, but the launch window is close enough that anyone still using an iPhone 15 faces a very practical question: is it better to keep the phone until the new model is official, or sell before the next wave of upgrades hits the market?
That decision is not really about chasing rumours. It is about timing. New flagship launches change what people want to buy, how many older phones arrive on the second-hand market and how much an existing handset contributes towards the next upgrade.
What is actually expected from the iPhone 18 Pro?
Current reporting points to the Pro models arriving in September 2026, while the standard iPhone 18 may follow later. The most discussed changes include a new A20-generation chip, a smaller Dynamic Island or under-display Face ID components, camera changes and Apple’s next modem. None of those details should be treated as confirmed until Apple announces the phone, but Macworld’s current iPhone 18 Pro rumour roundup gives a useful picture of where credible reporting currently sits.
For an iPhone 15 owner, the bigger question is whether those changes are worth paying for. Three generations is a more meaningful jump than upgrading every year, particularly if camera, battery efficiency or connectivity improvements matter to you.
Why selling before launch can make sense
The resale market has a simple problem around major launches: thousands of people reach the same conclusion at roughly the same time. They order the new model, then list or recycle the handset they already own. That increases the supply of older iPhones just as attention shifts towards the newest generation.
That does not guarantee a dramatic overnight price crash. Phone values move for many reasons, including condition, storage, demand and recycler stock. But if you already know you are upgrading, waiting until the old phone is one generation further behind rarely improves its position.
Anyone asking themselves “should I sell my iPhone 15 now?” can at least check today’s live recycler offers before making the decision. A quote is information: you do not have to post the phone simply because you have compared its value.
The better way to decide: calculate the net upgrade cost
Most launch coverage focuses on the price of the new handset. That is only half of the equation. The more useful number is:
NEW PHONE PRICE – CURRENT PHONE VALUE = REAL UPGRADE COST
If your current phone still covers a meaningful part of the new purchase, an upgrade may be easier to justify. If its resale value is already low and the expected iPhone 18 Pro features do not solve a problem you actually have, keeping the iPhone 15 for another year could be the smarter move.
Do not sell early just because a launch is coming
There is also a downside to getting carried away by launch-season hype. If you rely on your iPhone 15 every day, selling weeks too early can leave you without a phone or push you into buying before reviews are available. A sensible strategy is to check value now, decide the minimum price at which you would be happy to sell, and wait for Apple’s official announcement before committing if you are unsure.
Once you do decide to sell, Apple recommends backing up your data, signing out and removing personal information before handing the device over; its official pre-sale checklist is worth following.
So, should iPhone 15 owners sell before September?
If you are almost certain you will buy an iPhone 18 Pro, checking the resale market before launch is sensible. If you are still undecided, the better move is to compare the value of your current phone now and use that figure when the official iPhone 18 Pro price and specifications arrive.
Sites such as SellMyPhone.co.uk compare live offers from multiple UK recyclers, which turns the upgrade decision into a much simpler calculation: what will the new phone actually cost you after the value of the one already in your pocket?
