Zenfone 11 Ultra vs 15

Phone 1

Phone 2

Winner

Xiaomi 15

Lifespan decides this one: the 15 is supported until Mar 2030 at $16.81 per month of safe use, while the Zenfone 11 Ultra runs out in Mar 2028 ($28.55/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Zenfone 11 Ultra 61 · 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 11 Ultra $600

Buy with care$28.55/mo

2024◆ Buy-by Mar 20262028

Xiaomi 15 $750

Safe to buy$16.81/mo

2025◆ Buy-by Mar 20282030

Category by category

Display

Zenfone 11 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 11 Ultra 9215 98

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

Camera

Zenfone 11 Ultra 7915 79

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

Battery

Zenfone 11 Ultra 9015 85

5,500mAh vs 5,240mAh — the Zenfone 11 Ultra lasts longer between charges.

Software longevity

Zenfone 11 Ultra 2515 53

The 15 is supported until Mar 2030 — 24 months longer than the Zenfone 11 Ultra.

Value

Zenfone 11 Ultra 6115 67

Overall value goes to the 15 at $16.81 per month of safe use.

Full spec table

Spec	Zenfone 11 Ultra	15
Price (street)	$600	$750
Display	6.78-inch flexible E6 AMOLED, FHD+ (1080×2400), 144Hz, 2500-nit peak, 107% DCI-P3	6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+
Chipset	Snapdragon 8 Gen 3	Snapdragon 8 Elite
RAM	12GB/16GB	12GB
Storage	256GB/512GB	256GB/512GB
Battery	5,500 mAh	5,240 mAh
Charging	65W wired (HyperCharge), 15W Qi wireless	90W wired, 50W wireless
Rear cameras	50MP main (Sony IMX890 1/1.56-inch, gimbal OIS), 13MP ultra-wide (120-degree), 32MP telephoto 3x (OIS)	50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)
Dimensions	163.8 × 76.8 × 8.9 mm	152.3 × 71.2 × 8.08 mm
Weight	224 g	191 g
Water resistance	IP68	IP68
Supported until	Mar 2028	Mar 2030

Zenfone 11 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.