PhoneLifespan

15 Ultra vs Redmi 13 5G

vs

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 13 5G runs out in Jul 2028 ($5.64/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 15 Ultra 65 · Redmi 13 5G 68 — 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 13 5G $140
Buy with care$5.64/mo
2024◆ Buy-by Jul 20262028

Category by category

Display
15 Ultra 100Redmi 13 5G 70

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 13 5G 42

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

Camera
15 Ultra 96Redmi 13 5G 55

The 15 Ultra has the stronger camera system (4 real rear lenses vs 1).

Battery
15 Ultra 88Redmi 13 5G 81

5,410mAh vs 5,030mAh — the 15 Ultra lasts longer between charges.

Software longevity
15 Ultra 53Redmi 13 5G 30

The 15 Ultra is supported until Mar 2030 — 20 months longer than the Redmi 13 5G.

Value
15 Ultra 65Redmi 13 5G 68

Pound for pound, these two are equally good deals.

Full spec table
Spec15 UltraRedmi 13 5G
Price (street)$1350$140
Display6.73-inch 2K (1440×3200) LTPO AMOLED, 1–120Hz, up to 3200 nits peak6.79-inch IPS LCD, FHD+, 120Hz, 550 nits peak
ChipsetQualcomm Snapdragon 8 Elite (3nm)Qualcomm Snapdragon 4 Gen 2 AE
RAM16GB6GB/8GB
Storage512GB/1TB128GB/256GB
Battery5,410 mAh5,030 mAh
Charging90W wired, 80W wireless33W wired
Rear cameras50MP main, 50MP ultra-wide, 50MP telephoto (70mm floating), 200MP periscope telephoto108MP main, 2MP depth
Dimensions161.3 × 75.3 × 9.35 mm168.6 × 76.3 × 8.3 mm
Weight226 g205 g
Water resistanceIP68IP54
Supported untilMar 2030Jul 2028
15 Ultra full verdict →Redmi 13 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.