PhoneLifespan

12 vs 15T

vs

Winner

Xiaomi 15T

Lifespan decides this one: the 15T is supported until Sep 2030 at $9.73 per month of safe use, while the 12 runs out in Jan 2029 ($15.94/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 12 72 · 15T 70 — methodology

The lifespan decider

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

OnePlus 12 $500
Buy with care$15.94/mo
2024◆ Buy-by Jan 20272029
Xiaomi 15T $500
Safe to buy$9.73/mo
2025◆ Buy-by Sep 20282030

Category by category

Display
12 10015T 70

The 12's screen is the better one — 6.82-inch ltpo amoled proxdr, qhd+ (3168×1440), 1–120hz, up to 4500 nits peak.

Performance
12 9215T 78

The 12's Snapdragon 8 Gen 3 is simply the faster chip.

Camera
12 7915T 79

Camera systems are comparable on paper — pick by sample photos.

Battery
12 8815T 90

Battery capacities are close enough not to decide this.

Software longevity
12 3715T 61

The 15T is supported until Sep 2030 — 20 months longer than the 12.

Value
12 7215T 70

Pound for pound, these two are equally good deals.

Full spec table
Spec1215T
Price (street)$500$500
Display6.82-inch LTPO AMOLED ProXDR, QHD+ (3168×1440), 1–120Hz, up to 4500 nits peak6.83-inch AMOLED, 2772x1280, 144Hz
ChipsetSnapdragon 8 Gen 3MediaTek Dimensity 8400-Ultra
RAM12GB/16GB12GB
Storage256GB/512GB256GB/512GB
Battery5,400 mAh5,500 mAh
Charging80W SUPERVOOC wired (50W in North America), 50W wireless67W wired
Rear cameras50MP main, 48MP ultra-wide, 64MP periscope 3x50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions164.3 × 75.8 × 9.2 mm163.2 × 78.0 × 7.5 mm
Weight220 g194 g
Water resistanceIP65IP68
Supported untilJan 2029Sep 2030
12 full verdict →15T 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.