PhoneLifespan

15 vs Redmi A4 5G

vs

Winner

Xiaomi 15

Lifespan decides this one: the 15 is supported until Mar 2030 at $16.87 per month of safe use, while the Redmi A4 5G runs out in Nov 2028 ($3.41/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 15 67 · Redmi A4 5G 70 — 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 $750
Safe to buy$16.87/mo
2025◆ Buy-by Mar 20282030
Xiaomi Redmi A4 5G $100
Buy with care$3.41/mo
2024◆ Buy-by Nov 20262028

Category by category

Display
15 90Redmi A4 5G 70

The 15's screen is the better one — 6.36-inch crystalres amoled, 2670×1200 (460 ppi), 1–120hz ltpo, up to 3200 nits peak, dolby vision/hdr10+.

Performance
15 98Redmi A4 5G 55

The 15's Snapdragon 8 Elite is simply the faster chip.

Camera
15 79Redmi A4 5G 55

The 15 has the stronger camera system (3 real rear lenses vs 1).

Battery
15 85Redmi A4 5G 83

Battery capacities are close enough not to decide this.

Software longevity
15 53Redmi A4 5G 35

The 15 is supported until Mar 2030 — 15 months longer than the Redmi A4 5G.

Value
15 67Redmi A4 5G 70

Pound for pound, these two are equally good deals.

Full spec table
Spec15Redmi A4 5G
Price (street)$750$100
Display6.36-inch CrystalRes AMOLED, 2670×1200 (460 ppi), 1–120Hz LTPO, up to 3200 nits peak, Dolby Vision/HDR10+6.88-inch IPS LCD, HD+, 120Hz
ChipsetSnapdragon 8 EliteQualcomm Snapdragon 4s Gen 2 (4nm)
RAM12GB4GB
Storage256GB/512GB64GB/128GB
Battery5,240 mAh5,160 mAh
Charging90W wired, 50W wireless18W wired (33W charger in box)
Rear cameras50MP main (Light Fusion 900, f/1.62), 50MP ultra-wide, 50MP telephoto (Leica 60mm floating)50MP main
Dimensions152.3 × 71.2 × 8.08 mm171.88 × 77.8 × 8.22 mm
Weight191 g212 g
Water resistanceIP68IP52
Supported untilMar 2030Nov 2028
15 full verdict →Redmi A4 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.