PhoneLifespan

T4 5G vs Redmi Note 15 5G

vs

Winner

Xiaomi Redmi Note 15 5G

Lifespan decides this one: the Redmi Note 15 5G is supported until Dec 2029 at $6.03 per month of safe use, while the T4 5G runs out in Apr 2028 ($11.62/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: T4 5G 72 · Redmi Note 15 5G 71 — methodology

The lifespan decider

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

Vivo T4 5G $260
Buy with care$11.62/mo
2025◆ Buy-by Apr 20262028
Xiaomi Redmi Note 15 5G $250
Safe to buy$6.03/mo
2025◆ Buy-by Dec 20272029

Category by category

Display
T4 5G 80Redmi Note 15 5G 80

Both displays are effectively the same class.

Performance
T4 5G 64Redmi Note 15 5G 48

The T4 5G's Qualcomm Snapdragon 7s Gen 3 is simply the faster chip.

Camera
T4 5G 55Redmi Note 15 5G 67

The Redmi Note 15 5G has the stronger camera system (2 real rear lenses vs 1).

Battery
T4 5G 100Redmi Note 15 5G 90

7,300mAh vs 5,520mAh — the T4 5G lasts longer between charges.

Software longevity
T4 5G 27Redmi Note 15 5G 49

The Redmi Note 15 5G is supported until Dec 2029 — 19 months longer than the T4 5G.

Value
T4 5G 72Redmi Note 15 5G 71

Pound for pound, these two are equally good deals.

Full spec table
SpecT4 5GRedmi Note 15 5G
Price (street)$260$250
Display6.77-inch AMOLED, FHD+, 120Hz, 5000 nits peak6.77-inch AMOLED, FHD+, 120Hz, 3200 nits peak
ChipsetQualcomm Snapdragon 7s Gen 3Qualcomm Snapdragon 6 Gen 3
RAM8GB/12GB8GB
Storage128GB/256GB256GB/512GB
Battery7,300 mAh5,520 mAh
Charging90W wired45W wired
Rear cameras50MP main, 2MP depth108MP main, 8MP ultra-wide
Dimensions163.4 × 76.4 × 7.9 mm164 × 75.4 × 7.4 mm
Weight199 g178 g
Water resistanceIP65IP66
Supported untilApr 2028Dec 2029
T4 5G full verdict →Redmi Note 15 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.