12 4G vs Redmi Note 15 5G

Phone 1

Phone 2

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 12 4G runs out in Jul 2028 ($7.16/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 12 4G 63 · 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.

Realme 12 4G $175

Buy with care$7.16/mo

2024◆ Buy-by Jul 20262028

Xiaomi Redmi Note 15 5G $250

Safe to buy$6.03/mo

2025◆ Buy-by Dec 20272029

Category by category

Display

12 4G 70Redmi Note 15 5G 80

The Redmi Note 15 5G's screen is the better one — 6.77-inch amoled, fhd+, 120hz, 3200 nits peak.

Performance

12 4G 36Redmi Note 15 5G 48

The Redmi Note 15 5G's Qualcomm Snapdragon 6 Gen 3 is simply the faster chip.

Camera

12 4G 55Redmi Note 15 5G 67

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

Battery

12 4G 80Redmi Note 15 5G 90

5,520mAh vs 5,000mAh — the Redmi Note 15 5G lasts longer between charges.

Software longevity

12 4G 29Redmi Note 15 5G 49

The Redmi Note 15 5G is supported until Dec 2029 — 17 months longer than the 12 4G.

Value

12 4G 63Redmi Note 15 5G 71

Overall value goes to the Redmi Note 15 5G at $6.03 per month of safe use.

Full spec table

Spec	12 4G	Redmi Note 15 5G
Price (street)	$175	$250
Display	6.67-inch AMOLED, FHD+, 120Hz, up to 2000 nits peak	6.77-inch AMOLED, FHD+, 120Hz, 3200 nits peak
Chipset	Qualcomm Snapdragon 685 (6nm)	Qualcomm Snapdragon 6 Gen 3
RAM	8GB	8GB
Storage	128GB/256GB	256GB/512GB
Battery	5,000 mAh	5,520 mAh
Charging	67W wired SUPERVOOC	45W wired
Rear cameras	50MP main, 2MP depth	108MP main, 8MP ultra-wide
Dimensions	163 × 75.5 × 7.9 mm	164 × 75.4 × 7.4 mm
Weight	187 g	178 g
Water resistance	IP54	IP66
Supported until	Jul 2028	Dec 2029

12 4G 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.