PhoneLifespan

Phone (3a) Pro vs 15T

vs

It depends

Too close to call outright

These two are within 1 point overall, so it depends on you: keep phones for years → Phone (3a) Pro (supported until Mar 2031); want maximum speed → 15T (MediaTek Dimensity 8400-Ultra).

Value Score: Phone (3a) Pro 71 · 15T 70 methodology

The lifespan decider

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

Nothing Phone (3a) Pro $429
Safe to buy$7.57/mo
2025◆ Buy-by Mar 20292031
Xiaomi 15T $500
Safe to buy$9.73/mo
2025◆ Buy-by Sep 20282030

Category by category

Display
Phone (3a) Pro 8015T 70

The Phone (3a) Pro's screen is the better one — 6.77-inch amoled, 1080×2392 (fhd+), up to 120hz, 3000 nits peak.

Performance
Phone (3a) Pro 6415T 78

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

Camera
Phone (3a) Pro 7915T 79

Camera systems are comparable on paper — pick by sample photos.

Battery
Phone (3a) Pro 8015T 90

5,500mAh vs 5,000mAh — the 15T lasts longer between charges.

Software longevity
Phone (3a) Pro 6715T 61

The Phone (3a) Pro is supported until Mar 2031 — 5 months longer than the 15T.

Value
Phone (3a) Pro 7115T 70

Pound for pound, these two are equally good deals.

Full spec table
SpecPhone (3a) Pro15T
Price (street)$429$500
Display6.77-inch AMOLED, 1080×2392 (FHD+), up to 120Hz, 3000 nits peak6.83-inch AMOLED, 2772x1280, 144Hz
ChipsetSnapdragon 7s Gen 3MediaTek Dimensity 8400-Ultra
RAM12GB12GB
Storage256GB256GB/512GB
Battery5,000 mAh5,500 mAh
Charging50W wired, no wireless67W wired
Rear cameras50MP main, 50MP periscope telephoto 3x, 8MP ultra-wide50MP main, 50MP telephoto 2x, 12MP ultra-wide
Dimensions163.52 × 77.50 × 8.39 mm163.2 × 78.0 × 7.5 mm
Weight211 g194 g
Water resistanceIP64IP68
Supported untilMar 2031Sep 2030

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.