15 Ultra vs Redmi Turbo 4

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 Redmi Turbo 4 runs out in Jan 2029 ($7.04/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 15 Ultra 65 · Redmi Turbo 4 76 — methodology

The lifespan decider

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

Xiaomi 15 Ultra $1350

Safe to buy$30.36/mo

2025◆ Buy-by Mar 20282030

Xiaomi Redmi Turbo 4 $215

Buy with care$7.04/mo

2025◆ Buy-by Jan 20272029

Category by category

Display

15 Ultra 100Redmi Turbo 4 80

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

15 Ultra 98Redmi Turbo 4 78

The 15 Ultra's Qualcomm Snapdragon 8 Elite (3nm) is simply the faster chip.

Camera

15 Ultra 96Redmi Turbo 4 67

The 15 Ultra has the stronger camera system (4 real rear lenses vs 2).

Battery

15 Ultra 88Redmi Turbo 4 100

6,550mAh vs 5,410mAh — the Redmi Turbo 4 lasts longer between charges.

Software longevity

15 Ultra 53Redmi Turbo 4 36

The 15 Ultra is supported until Mar 2030 — 14 months longer than the Redmi Turbo 4.

Value

15 Ultra 65Redmi Turbo 4 76

Overall value goes to the Redmi Turbo 4 at $7.04 per month of safe use.

Full spec table

Spec	15 Ultra	Redmi Turbo 4
Price (street)	$1350	$215
Display	6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak	6.67-inch LTPS OLED, 1.5K, 120Hz, 3200 nits peak
Chipset	Qualcomm Snapdragon 8 Elite (3nm)	MediaTek Dimensity 8400-Ultra (4nm)
RAM	16GB	12GB/16GB
Storage	512GB/1TB	256GB/512GB
Battery	5,410 mAh	6,550 mAh
Charging	90W wired, 80W wireless	90W wired
Rear cameras	50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto	50MP main, 8MP ultra-wide
Dimensions	161.3 × 75.3 × 9.35 mm	161 × 75.2 × 8.1 mm
Weight	226 g	204 g
Water resistance	IP68	IP68
Supported until	Mar 2030	Jan 2029

15 Ultra full verdict →Redmi Turbo 4 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.