Zenfone 12 Ultra vs 15

Phone 1

Phone 2

Winner

Xiaomi 15

Lifespan decides this one: the 15 is supported until Mar 2030 at $16.87 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 67 — 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 $750

Safe to buy$16.87/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

Zenfone 12 Ultra 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

Zenfone 12 Ultra 9815 98

Performance is a wash — same chip tier.

Camera

Zenfone 12 Ultra 7915 79

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

Battery

Zenfone 12 Ultra 9015 85

5,500mAh vs 5,240mAh — the Zenfone 12 Ultra lasts longer between charges.

Software longevity

Zenfone 12 Ultra 3815 53

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

Value

Zenfone 12 Ultra 5815 67

Overall value goes to the 15 at $16.87 per month of safe use.

Full spec table

Spec	Zenfone 12 Ultra	15
Price (street)	$950	$750
Display	6.78-inch AMOLED, FHD+, 144Hz, Gorilla Glass Victus 2	6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
Chipset	Qualcomm Snapdragon 8 Elite (3nm)	Snapdragon 8 Elite
RAM	12GB/16GB	12GB
Storage	256GB/512GB	256GB/512GB
Battery	5,500 mAh	5,240 mAh
Charging	65W wired, 15W wireless	90W wired, 50W wireless
Rear cameras	50MP main, 32MP telephoto, 13MP ultra-wide	50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions	163.8 × 77.0 × 8.9 mm	152.3 × 71.2 × 8.08 mm
Weight	220 g	191 g
Water resistance	IP68	IP68
Supported until	Feb 2029	Mar 2030

Zenfone 12 Ultra 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.