400 vs 12

Phone 1

Phone 2

Winner

Honor 400

Lifespan decides this one: the 400 is supported until May 2031 at $5.92 per month of safe use, while the 12 runs out in Jan 2029 ($16.01/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 400 76 · 12 72 — methodology

The lifespan decider

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

Honor 400 $350

Safe to buy$5.92/mo

2025◆ Buy-by May 20292031

OnePlus 12 $500

Buy with care$16.01/mo

2024◆ Buy-by Jan 20272029

Category by category

Display

400 8012 100

The 12's screen is the better one — 6.82-inch ltpo amoled proxdr, qhd+ (3168×1440), 1–120hz, up to 4500 nits peak.

Performance

400 6412 92

The 12's Snapdragon 8 Gen 3 is simply the faster chip.

Camera

400 7212 79

The 12 has the stronger camera system (3 real rear lenses vs 2).

Battery

400 8612 88

Battery capacities are close enough not to decide this.

Software longevity

400 7012 37

The 400 is supported until May 2031 — 28 months longer than the 12.

Value

400 7612 72

Overall value goes to the 400 at $5.92 per month of safe use.

Full spec table

Spec	400	12
Price (street)	$350	$500
Display	6.55-inch AMOLED, 1.5K, 120Hz, 5000 nits peak	6.82-inch LTPO AMOLED ProXDR, QHD+ (3168×1440), 1–120Hz, up to 4500 nits peak
Chipset	Qualcomm Snapdragon 7 Gen 3 (4nm)	Snapdragon 8 Gen 3
RAM	8GB/12GB	12GB/16GB
Storage	256GB/512GB	256GB/512GB
Battery	5,300 mAh	5,400 mAh
Charging	66W wired (5300mAh EU model), 5W reverse wired	80W SUPERVOOC wired (50W in North America), 50W wireless
Rear cameras	200MP main, 12MP ultra-wide	50MP main, 48MP ultra-wide, 64MP periscope 3x
Dimensions	156.5 × 74.6 × 7.3 mm	164.3 × 75.8 × 9.2 mm
Weight	184 g	220 g
Water resistance	IP65/IP66 (market dependent)	IP65
Supported until	May 2031	Jan 2029

400 full verdict →12 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.