Zenfone 12 Ultra vs 15 Ultra

Phone 1

Phone 2

Winner

Xiaomi 15 Ultra

Lifespan decides this one: the 15 Ultra is supported until Mar 2030 at $30.36 per month of safe use, while the Zenfone 12 Ultra runs out in Feb 2029 ($29.99/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Zenfone 12 Ultra 58 · 15 Ultra 65 — methodology

The lifespan decider

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

Asus Zenfone 12 Ultra $950

Buy with care$29.99/mo

2025◆ Buy-by Feb 20272029

Xiaomi 15 Ultra $1350

Safe to buy$30.36/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

Zenfone 12 Ultra 7015 Ultra 100

The 15 Ultra's screen is the better one — 6.73-inch 2k (1440×3200) ltpo amoled, 1–120hz, up to 3200 nits peak.

Performance

Zenfone 12 Ultra 9815 Ultra 98

Performance is a wash — same chip tier.

Camera

Zenfone 12 Ultra 7915 Ultra 96

The 15 Ultra has the stronger camera system (4 real rear lenses vs 3).

Battery

Zenfone 12 Ultra 9015 Ultra 88

Battery capacities are close enough not to decide this.

Software longevity

Zenfone 12 Ultra 3815 Ultra 53

The 15 Ultra is supported until Mar 2030 — 13 months longer than the Zenfone 12 Ultra.

Value

Zenfone 12 Ultra 5815 Ultra 65

Overall value goes to the 15 Ultra at $30.36 per month of safe use.

Full spec table

Spec	Zenfone 12 Ultra	15 Ultra
Price (street)	$950	$1350
Display	6.78-inch AMOLED, FHD+, 144Hz, Gorilla Glass Victus 2	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak
Chipset	Qualcomm Snapdragon 8 Elite (3nm)	Qualcomm Snapdragon 8 Elite (3nm)
RAM	12GB/16GB	16GB
Storage	256GB/512GB	512GB/1TB
Battery	5,500 mAh	5,410 mAh
Charging	65W wired, 15W wireless	90W wired, 80W wireless
Rear cameras	50MP main, 32MP telephoto, 13MP ultra-wide	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto
Dimensions	163.8 × 77.0 × 8.9 mm	161.3 × 75.3 × 9.35 mm
Weight	220 g	226 g
Water resistance	IP68	IP68
Supported until	Feb 2029	Mar 2030

Zenfone 12 Ultra full verdict →15 Ultra 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.