15 vs Poco F8 Ultra
Winner
Xiaomi Poco F8 Ultra
The Poco F8 Ultra wins this one, taking software longevity and battery decisively. Against the 15 it's also the sounder buy at $10.94 per month of safe use.
Value Score: 15 67 · Poco F8 Ultra 75 — methodology
Who should pick which
Beyond the scores — our take on each phone and the buyer it actually suits.
A compact flagship that pairs the Snapdragon 8 Elite with a genuinely pocketable body and a long support window, but you'll likely import it.
Pick it if
- ✓ Buyers who want a small high-end phone
- ✓ Photography enthusiasts who like Leica processing
- ✓ People who keep phones 4+ years and value long updates
Skip it if
- ✗ You need official US carrier support and warranty
- ✗ You want the biggest possible screen and battery
The Poco F8 Ultra undercuts Xiaomi's own flagships at $729, backing a Snapdragon 8 Elite Gen 5 and Bose-tuned dual speakers with a confirmed 4-year OS / 6-year security promise through November 2031.
Pick it if
- ✓ Buyers who want flagship performance without flagship pricing
- ✓ Anyone prioritizing a documented, multi-year update promise
Skip it if
- ✗ You want the biggest possible battery in this class
- ✗ You need official US carrier warranty support
The lifespan decider
When specs are close, support length decides it — this is what each phone costs per month of safe use.
Category by category
The 15's screen is the better one — 6.36-inch crystalres amoled, 2670×1200 (460 ppi), 1–120hz ltpo, up to 3200 nits peak, dolby vision/hdr10+.
Performance is a wash — same chip tier.
Camera systems are comparable on paper — pick by sample photos.
6,500mAh vs 5,240mAh — the Poco F8 Ultra lasts longer between charges.
The Poco F8 Ultra is supported until Nov 2031 — 21 months longer than the 15.
Overall value goes to the Poco F8 Ultra at $10.94 per month of safe use.
Frequently asked
Is the Xiaomi 15 sold in the United States?
No. Xiaomi does not sell the Xiaomi 15 through official US channels, so American buyers rely on importers or used units, and some US carrier bands may not be fully supported.
How long will the Xiaomi 15 receive updates?
Xiaomi commits to four major Android/HyperOS upgrades and five years of security patches, putting end of support around March 2030 for a phone released in March 2025.
How long will the Poco F8 Ultra be supported?
Poco confirmed 4 years of Android/HyperOS version upgrades and 6 years of security patches for the F8 series, putting end-of-support around November 2031 -- about 5.4 years remain from a mid-2026 purchase.
Is the Poco F8 Ultra sold in the US?
It has a genuine global retail launch and is available through Xiaomi's online store and authorized resellers in many regions, but it isn't carried by US carriers, so US buyers are effectively importing without a domestic warranty.
Full spec table
| Spec | 15 | Poco F8 Ultra |
|---|---|---|
| Price (street) | $750 | $700 |
| Display | 6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+ | 6.9-inch AMOLED, 2K, 120Hz, up to 3500 nits peak, HDR10+/Dolby Vision |
| Chipset | Snapdragon 8 Elite | Qualcomm Snapdragon 8 Elite Gen 5 |
| RAM | 12GB | 12GB/16GB |
| Storage | 256GB/512GB | 256GB/512GB |
| Battery | 5,240 mAh | 6,500 mAh |
| Charging | 90W wired, 50W wireless | 100W wired, 50W wireless |
| Rear cameras | 50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating) | 50MP main, 50MP periscope 5x, 50MP ultra-wide |
| Dimensions | 152.3 × 71.2 × 8.08 mm | 163.3 x 77.8 x 7.9 mm |
| Weight | 191 g | 218 g |
| Water resistance | IP68 | IP68 |
| Supported until | Mar 2030 | Nov 2031 |
More comparisons
Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.