PhoneLifespan

15T vs Redmi A5

vs

Winner

Xiaomi 15T

Lifespan decides this one: the 15T is supported until Sep 2030 at $9.76 per month of safe use, while the Redmi A5 runs out in Mar 2028 ($3.55/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 15T 70 · Redmi A5 65 — methodology

The lifespan decider

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

Xiaomi 15T $500
Safe to buy$9.76/mo
2025◆ Buy-by Sep 20282030
Xiaomi Redmi A5 $75
Buy with care$3.55/mo
2025◆ Buy-by Mar 20262028

Category by category

Display
15T 70Redmi A5 70

Both displays are effectively the same class.

Performance
15T 78Redmi A5 55

The 15T's MediaTek Dimensity 8400-Ultra is simply the faster chip.

Camera
15T 79Redmi A5 40

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

Battery
15T 90Redmi A5 84

5,500mAh vs 5,200mAh — the 15T lasts longer between charges.

Software longevity
15T 61Redmi A5 25

The 15T is supported until Sep 2030 — 30 months longer than the Redmi A5.

Value
15T 70Redmi A5 65

Overall value goes to the 15T at $9.76 per month of safe use.

Full spec table
Spec15TRedmi A5
Price (street)$500$75
Display6.83-inch AMOLED, 2772x1280, 144Hz6.88-inch IPS LCD, HD+, 120Hz
ChipsetMediaTek Dimensity 8400-UltraUnisoc T7250
RAM12GB3GB/4GB/6GB
Storage256GB/512GB64GB/128GB
Battery5,500 mAh5,200 mAh
Charging67W wired15W wired
Rear cameras50MP main, 50MP telephoto 2x, 12MP ultra-wide32MP main
Dimensions163.2 × 78.0 × 7.5 mm171.4 × 77.8 × 8.3 mm
Weight194 g193 g
Water resistanceIP68IP52
Supported untilSep 2030Mar 2028
15T full verdict →Redmi A5 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.