PhoneLifespan

13 Ultra 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 13 Ultra runs out in Apr 2028 ($29.33/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 13 Ultra 62 · 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.

Xiaomi 13 Ultra $650
Buy with care$29.33/mo
2023◆ Buy-by Apr 20262028
Xiaomi 15T $500
Safe to buy$9.73/mo
2025◆ Buy-by Sep 20282030

Category by category

Display
13 Ultra 9015T 70

The 13 Ultra's screen is the better one — 6.73-inch ltpo amoled, 3200 x 1440, 120hz.

Performance
13 Ultra 8515T 78

The 13 Ultra's Qualcomm Snapdragon 8 Gen 2 is simply the faster chip.

Camera
13 Ultra 9115T 79

The 13 Ultra has the stronger camera system (4 real rear lenses vs 3).

Battery
13 Ultra 8015T 90

5,500mAh vs 5,000mAh — the 15T lasts longer between charges.

Software longevity
13 Ultra 2615T 61

The 15T is supported until Sep 2030 — 29 months longer than the 13 Ultra.

Value
13 Ultra 6215T 70

Overall value goes to the 15T at $9.73 per month of safe use.

Full spec table
Spec13 Ultra15T
Price (street)$650$500
Display6.73-inch LTPO AMOLED, 3200 x 1440, 120Hz6.83-inch AMOLED, 2772x1280, 144Hz
ChipsetQualcomm Snapdragon 8 Gen 2MediaTek Dimensity 8400-Ultra
RAM12GB/16GB12GB
Storage256GB/512GB/1TB256GB/512GB
Battery5,000 mAh5,500 mAh
Charging90W wired, 50W wireless67W wired
Rear cameras50MP main, 50MP ultra-wide, 50MP telephoto 3.2x, 50MP periscope telephoto 5x50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions163.2 × 74.6 × 9.1 mm163.2 × 78.0 × 7.5 mm
Weight227 g194 g
Water resistanceIP68IP68
Supported untilApr 2028Sep 2030
13 Ultra 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.