PhoneLifespan

15 Ultra vs Redmi Note 15 5G

vs

Winner

Xiaomi Redmi Note 15 5G

Lifespan decides this one: the Redmi Note 15 5G is supported until Dec 2029 at $6.03 per month of safe use, while the 15 Ultra runs out in Mar 2030 ($30.36/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 15 Ultra 65 · Redmi Note 15 5G 71 — 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 Note 15 5G $250
Safe to buy$6.03/mo
2025◆ Buy-by Dec 20272029

Category by category

Display
15 Ultra 100Redmi Note 15 5G 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 Note 15 5G 48

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

Camera
15 Ultra 96Redmi Note 15 5G 67

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

Battery
15 Ultra 88Redmi Note 15 5G 90

Battery capacities are close enough not to decide this.

Software longevity
15 Ultra 53Redmi Note 15 5G 49

The 15 Ultra is supported until Mar 2030 — 3 months longer than the Redmi Note 15 5G.

Value
15 Ultra 65Redmi Note 15 5G 71

Overall value goes to the Redmi Note 15 5G at $6.03 per month of safe use.

Full spec table
Spec15 UltraRedmi Note 15 5G
Price (street)$1350$250
Display6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak6.77-inch AMOLED, FHD+, 120Hz, 3200 nits peak
ChipsetQualcomm Snapdragon 8 Elite (3nm)Qualcomm Snapdragon 6 Gen 3
RAM16GB8GB
Storage512GB/1TB256GB/512GB
Battery5,410 mAh5,520 mAh
Charging90W wired, 80W wireless45W wired
Rear cameras50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto108MP main, 8MP ultra-wide
Dimensions161.3 × 75.3 × 9.35 mm164 × 75.4 × 7.4 mm
Weight226 g178 g
Water resistanceIP68IP66
Supported untilMar 2030Dec 2029
15 Ultra full verdict →Redmi Note 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.