14 Ultra vs Redmi 15 5G

Phone 1

Phone 2

Winner

Xiaomi Redmi 15 5G

Lifespan decides this one: the Redmi 15 5G is supported until Aug 2029 at $4.80 per month of safe use, while the 14 Ultra runs out in Feb 2029 ($23.29/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 14 Ultra 64 · Redmi 15 5G 75 — methodology

The lifespan decider

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

Xiaomi 14 Ultra $750

Buy with care$23.29/mo

2024◆ Buy-by Feb 20272029

Xiaomi Redmi 15 5G $180

Safe to buy$4.80/mo

2025◆ Buy-by Aug 20272029

Category by category

Display

14 Ultra 90Redmi 15 5G 70

The 14 Ultra's screen is the better one — 6.73-inch ltpo amoled, 3200 x 1440, 120hz.

Performance

14 Ultra 92Redmi 15 5G 46

The 14 Ultra's Qualcomm Snapdragon 8 Gen 3 is simply the faster chip.

Camera

14 Ultra 91Redmi 15 5G 55

The 14 Ultra has the stronger camera system (4 real rear lenses vs 1).

Battery

14 Ultra 80Redmi 15 5G 100

7,000mAh vs 5,000mAh — the Redmi 15 5G lasts longer between charges.

Software longevity

14 Ultra 38Redmi 15 5G 45

The Redmi 15 5G is supported until Aug 2029 — 5 months longer than the 14 Ultra.

Value

14 Ultra 64Redmi 15 5G 75

Overall value goes to the Redmi 15 5G at $4.80 per month of safe use.

Full spec table

Spec	14 Ultra	Redmi 15 5G
Price (street)	$750	$180
Display	6.73-inch LTPO AMOLED, 3200 x 1440, 120Hz	6.9-inch IPS LCD, FHD+, 144Hz, 850 nits peak
Chipset	Qualcomm Snapdragon 8 Gen 3	Qualcomm Snapdragon 6s Gen 3
RAM	12GB/16GB	4GB/6GB/8GB
Storage	256GB/512GB/1TB	128GB/256GB
Battery	5,000 mAh	7,000 mAh
Charging	90W wired, 80W wireless	33W wired, 18W reverse wired
Rear cameras	50MP main, 50MP ultra-wide, 50MP telephoto 3.2x, 50MP periscope telephoto 5x	50MP main, 2MP depth
Dimensions	161.4 × 75.3 × 9.2 mm	169.5 × 80.5 × 8.4 mm
Weight	220 g	217 g
Water resistance	IP68	IP64
Supported until	Feb 2029	Aug 2029

14 Ultra full verdict →Redmi 15 5G 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.