Should I upgrade my iPhone 15?
The Apple iPhone 15 went on sale on 22 September 2023. It has a 6.1-inch display, a weight of 171 g, the A16 Bionic chip, a 48 MP main camera and 128 GB of storage to start. Apple claims up to 20 hours of video playback. Apple publishes no end date for its security updates. Every figure in the Apple iPhone 15 specifications below links the page it came from and the date it was read.
3 years oldNo published support end dateRead
Is it still supported?
Apple publishes no end date, and this site does not guess one. The support card on the iPhone 15 page says what is known and where it came from.endoflife.date — iPhone, retrieved 2026-08-19
What the iPhone 17 changes
The newest Apple phone in this line is the iPhone 17 at £799, released 19 September 2025. Judged row by row against our published thresholds; the full table is at iPhone 17 vs iPhone 15.
On the makers’ figures and the named third-party sources, the iPhone 17 wins on peak brightness (3,000 nits against 2,000 nits), storage (base) (256 GB against 128 GB), claimed video playback (30 h against 20 h) and Geekbench 6 (CPU, multi-core) (8,276 against 5,967, both from Geekbench Browser). 3 gaps are borderline, differences most people would not notice: display size (6.3 in against 6.1 in) for the iPhone 17, fast charging (40 W against 20 W) for the iPhone 17 and wireless charging (25 W against 15 W) for the iPhone 17. The differences in weight, RAM and battery capacity are below the thresholds you would notice. Both state the same typical brightness and HDR peak brightness. The other 37 rows have no threshold or no direction to judge by, so nobody wins them.
- Peak brightness: 2,000 nits → 3,000 nits
- Storage (base): 128 GB → 256 GB
- Claimed video playback: 20 h → 30 h
- Geekbench 6 (CPU, multi-core): 5,967 → 8,276
- Display size: 6.1 in → 6.3 in borderline; marginal — most people won’t notice.
- Fast charging: 20 W → 40 W borderline; marginal — most people won’t notice.
- Wireless charging: 15 W → 25 W borderline; marginal — most people won’t notice.
Other makers at the price
Phones from other makers released within a year of the iPhone 17 and priced within a quarter of its £799, nearest price first, each judged the same way against your iPhone 15 — or, where that pair is not one this site indexes, against the iPhone 17.
What yours is worth
Our reading of the figures
Apple publishes no end date for the iPhone 15’s security updates, so support is not a reason to move until it is.
The iPhone 17 clears our noticeable threshold on 4 rows: peak brightness, storage (base), claimed video playback, Geekbench 6 (CPU, multi-core). 3 more gaps are borderline, which most people would not notice. Nothing goes backwards.
At £799 new, less the £283 CeX was paying for a grade A iPhone 15 on 2026-02-20, the move costs about £516.
Every sentence above is built from the figures on this page by a rule, not written for this phone: a support date, the rows that clear a published threshold, a price and a trade-in. There is no score and no recommendation. The methodology page has the thresholds and where they come from. Every phone’s version of this page is listed at All upgrade questions.