PhoneLifespan

P3 Ultra 5G vs Redmi Note 15 Pro 5G

vs

Winner

Xiaomi Redmi Note 15 Pro 5G

Lifespan decides this one: the Redmi Note 15 Pro 5G is supported until Jan 2030 at $7.45 per month of safe use, while the P3 Ultra 5G runs out in Mar 2029 ($9.49/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: P3 Ultra 5G 74 · Redmi Note 15 Pro 5G 73 — methodology

The lifespan decider

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

Realme P3 Ultra 5G $315
Buy with care$9.49/mo
2025◆ Buy-by Mar 20272029
Xiaomi Redmi Note 15 Pro 5G $320
Safe to buy$7.45/mo
2026◆ Buy-by Jan 20282030

Category by category

Display
P3 Ultra 5G 70Redmi Note 15 Pro 5G 70

Both displays are effectively the same class.

Performance
P3 Ultra 5G 74Redmi Note 15 Pro 5G 62

The P3 Ultra 5G's MediaTek Dimensity 8350 Ultra (4nm) is simply the faster chip.

Camera
P3 Ultra 5G 67Redmi Note 15 Pro 5G 72

The Redmi Note 15 Pro 5G has the stronger camera system — same lens count, higher-grade sensors.

Battery
P3 Ultra 5G 100Redmi Note 15 Pro 5G 100

Battery capacities are close enough not to decide this.

Software longevity
P3 Ultra 5G 40Redmi Note 15 Pro 5G 51

The Redmi Note 15 Pro 5G is supported until Jan 2030 — 10 months longer than the P3 Ultra 5G.

Value
P3 Ultra 5G 74Redmi Note 15 Pro 5G 73

Pound for pound, these two are equally good deals.

Full spec table
SpecP3 Ultra 5GRedmi Note 15 Pro 5G
Price (street)$315$320
Display6.83-inch AMOLED, 1.5K, 120Hz, up to 1500 nits peak, Gorilla Glass 7i6.83-inch AMOLED, 1.5K, 120Hz, 12-bit, Dolby Vision/HDR10+
ChipsetMediaTek Dimensity 8350 Ultra (4nm)MediaTek Dimensity 7400-Ultra (4nm)
RAM8GB/12GB8GB/12GB
Storage128GB/256GB/512GB256GB/512GB
Battery6,000 mAh6,580 mAh
Charging80W wired (100% in 47 min), 5W reverse45W wired, 22.5W reverse wired
Rear cameras50MP main, 8MP ultra-wide200MP main, 8MP ultra-wide
Dimensions163.1 × 76.9 × 7.4 mm163.6 × 78.1 × 8.0 mm
Weight183 g210 g
Water resistanceIP68/IP69IP68/IP69
Supported untilMar 2029Jan 2030
P3 Ultra 5G full verdict →Redmi Note 15 Pro 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.