PhoneLifespan

13T vs 15

vs

Winner

Xiaomi 15

Lifespan decides this one: the 15 is supported until Mar 2030 at $16.81 per month of safe use, while the 13T runs out in Sep 2028 ($12.75/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 13T 69 · 15 67 — methodology

The lifespan decider

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

Xiaomi 13T $350
Buy with care$12.75/mo
2023◆ Buy-by Sep 20262028
Xiaomi 15 $750
Safe to buy$16.81/mo
2025◆ Buy-by Mar 20282030

Category by category

Display
13T 7015 90

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
13T 7515 98

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

Camera
13T 7915 79

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

Battery
13T 8015 85

5,240mAh vs 5,000mAh — the 15 lasts longer between charges.

Software longevity
13T 3315 53

The 15 is supported until Mar 2030 — 17 months longer than the 13T.

Value
13T 6915 67

Pound for pound, these two are equally good deals.

Full spec table
Spec13T15
Price (street)$350$750
Display6.67-inch AMOLED, 2712 x 1220, 144Hz6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
ChipsetMediaTek Dimensity 8200 UltraSnapdragon 8 Elite
RAM8GB/12GB12GB
Storage256GB256GB/512GB
Battery5,000 mAh5,240 mAh
Charging67W wired90W wired, 50W wireless
Rear cameras50MP main, 12MP ultra-wide, 50MP telephoto 2x50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions162.2 × 75.7 × 8.5 mm152.3 × 71.2 × 8.08 mm
Weight197 g191 g
Water resistanceIP68IP68
Supported untilSep 2028Mar 2030
13T full verdict →15 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.