Should I upgrade my REDMI Note 15 Pro+ 5G?
The Xiaomi REDMI Note 15 Pro+ 5G went on sale on 25 December 2025. The Xiaomi UK store price is £429 (read 12 September 2026). It has a 6.83-inch display, a weight of 207.1 g, the Snapdragon 7s Gen 4 (4nm) chip, a 200 MP main camera and 256 GB of storage to start. Xiaomi claims up to 25 hours of video playback. Security updates are committed until 25 December 2031. Every figure in the Xiaomi REDMI Note 15 Pro+ 5G specifications below links the page it came from and the date it was read.
under a year oldPatched until 2031-12-25Read
Is it still supported?
Yes. Xiaomi has committed to security updates for the REDMI Note 15 Pro+ 5G until 2031-12-25. A phone that is still patched is not a phone you have to replace.Xiaomi UK — REDMI Note 15 Pro+ 5G, retrieved 2026-08-20
What the Xiaomi 17T changes
This line has nothing newer on this site; the newest Xiaomi phone within a year of it is the Xiaomi 17T at £649, released 28 May 2026. Judged row by row against our published thresholds; the full table is at Xiaomi 17T vs REDMI Note 15 Pro+ 5G.
On the makers’ published figures, the REDMI Note 15 Pro+ 5G wins on fast charging (100 W against 67 W). 4 gaps are borderline, differences most people would not notice: display size (6.83 in against 6.59 in) for the REDMI Note 15 Pro+ 5G, peak brightness (3,500 nits against 3,200 nits) for the Xiaomi 17T, RAM (12 GB against 8 GB) for the Xiaomi 17T and battery per charge (65.67 h against 60.78 h) for the Xiaomi 17T. The difference in weight is below the threshold you would notice. Both state the same refresh rate, storage (base), battery capacity and battery lifespan. The other 33 rows have no threshold or no direction to judge by, so nobody wins them.
- Display size: 6.83 in → 6.59 in borderline; marginal — most people won’t notice.
- Peak brightness: 3,200 nits → 3,500 nits borderline; marginal — most people won’t notice.
- RAM: 8 GB → 12 GB borderline; marginal — most people won’t notice.
- Battery per charge: 60.78 h → 65.67 h borderline; marginal — most people won’t notice.
Other makers at the price
Phones from other makers released within a year of the Xiaomi 17T and priced within a quarter of its £649, nearest price first, each judged the same way against your REDMI Note 15 Pro+ 5G — or, where that pair is not one this site indexes, against the Xiaomi 17T.
What yours is worth
Our reading of the figures
The REDMI Note 15 Pro+ 5G is committed to security updates until 25 December 2031, so nothing forces a move yet.
On the published figures, the Xiaomi 17T does not win a single row by a gap you would notice; the differences are below our thresholds or have no direction to judge.
At £649 new, less the £176 CeX was paying for a grade A REDMI Note 15 Pro+ 5G on 2026-09-11, the move costs about £473.
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.