PhoneLifespan

15 vs Poco X7 5G

vs

Winner

Xiaomi 15

Lifespan decides this one: the 15 is supported until Mar 2030 at $16.87 per month of safe use, while the Poco X7 5G runs out in Jan 2029 ($7.47/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 15 67 · Poco X7 5G 75 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Xiaomi 15 $750
Safe to buy$16.87/mo
2025◆ Buy-by Mar 20282030
Xiaomi Poco X7 5G $230
Buy with care$7.47/mo
2025◆ Buy-by Jan 20272029

Category by category

Display
15 90Poco X7 5G 80

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
15 98Poco X7 5G 58

The 15's Snapdragon 8 Elite is simply the faster chip.

Camera
15 79Poco X7 5G 67

The 15 has the stronger camera system (3 real rear lenses vs 2).

Battery
15 85Poco X7 5G 90

5,500mAh vs 5,240mAh — the Poco X7 5G lasts longer between charges.

Software longevity
15 53Poco X7 5G 37

The 15 is supported until Mar 2030 — 14 months longer than the Poco X7 5G.

Value
15 67Poco X7 5G 75

Overall value goes to the Poco X7 5G at $7.47 per month of safe use.

Full spec table
Spec15Poco X7 5G
Price (street)$750$230
Display6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+6.67-inch AMOLED, 1.5K (446 ppi), 120Hz, 3000 nits peak, Gorilla Glass Victus 2
ChipsetSnapdragon 8 EliteMediaTek Dimensity 7300 Ultra (4nm)
RAM12GB8GB/12GB
Storage256GB/512GB128GB/256GB/512GB
Battery5,240 mAh5,500 mAh
Charging90W wired, 50W wireless45W wired
Rear cameras50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)50MP main, 8MP ultra-wide, 2MP macro
Dimensions152.3 × 71.2 × 8.08 mm162.3 × 74.4 × 8.4 mm
Weight191 g190 g
Water resistanceIP68IP68 (also IP69)
Supported untilMar 2030Jan 2029
15 full verdict →Poco X7 5G full verdict →Longevity master board →

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.