13 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 13 Ultra runs out in Apr 2028 ($29.52/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 13 Ultra 62 · 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 13 Ultra $650

Buy with care$29.52/mo

2023◆ Buy-by Apr 20262028

Xiaomi Redmi 15 5G $180

Safe to buy$4.80/mo

2025◆ Buy-by Aug 20272029

Category by category

Display

13 Ultra 90Redmi 15 5G 70

The 13 Ultra's screen is the better one — 6.73-inch ltpo amoled, 3200 x 1440, 120hz.

Performance

13 Ultra 85Redmi 15 5G 46

The 13 Ultra's Qualcomm Snapdragon 8 Gen 2 is simply the faster chip.

Camera

13 Ultra 91Redmi 15 5G 55

The 13 Ultra has the stronger camera system (4 real rear lenses vs 1).

Battery

13 Ultra 80Redmi 15 5G 100

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

Software longevity

13 Ultra 26Redmi 15 5G 45

The Redmi 15 5G is supported until Aug 2029 — 15 months longer than the 13 Ultra.

Value

13 Ultra 62Redmi 15 5G 75

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

Full spec table

Spec	13 Ultra	Redmi 15 5G
Price (street)	$650	$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 2	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, 50W 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	163.2 × 74.6 × 9.1 mm	169.5 × 80.5 × 8.4 mm
Weight	227 g	217 g
Water resistance	IP68	IP64
Supported until	Apr 2028	Aug 2029

13 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.