400 vs Redmi Turbo 4

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 Redmi Turbo 4 runs out in Jan 2029 ($7.04/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 400 76 · Redmi Turbo 4 76 — 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

Xiaomi Redmi Turbo 4 $215

Buy with care$7.04/mo

2025◆ Buy-by Jan 20272029

Category by category

Display

400 80Redmi Turbo 4 80

Both displays are effectively the same class.

Performance

400 64Redmi Turbo 4 78

The Redmi Turbo 4's MediaTek Dimensity 8400-Ultra (4nm) is simply the faster chip.

Camera

400 72Redmi Turbo 4 67

The 400 has the stronger camera system — same lens count, higher-grade sensors.

Battery

400 86Redmi Turbo 4 100

6,550mAh vs 5,300mAh — the Redmi Turbo 4 lasts longer between charges.

Software longevity

400 70Redmi Turbo 4 36

The 400 is supported until May 2031 — 29 months longer than the Redmi Turbo 4.

Value

400 76Redmi Turbo 4 76

Pound for pound, these two are equally good deals.

Full spec table

Spec	400	Redmi Turbo 4
Price (street)	$350	$215
Display	6.55-inch AMOLED, 1.5K, 120Hz, 5000 nits peak	6.67-inch LTPS OLED, 1.5K, 120Hz, 3200 nits peak
Chipset	Qualcomm Snapdragon 7 Gen 3 (4nm)	MediaTek Dimensity 8400-Ultra (4nm)
RAM	8GB/12GB	12GB/16GB
Storage	256GB/512GB	256GB/512GB
Battery	5,300 mAh	6,550 mAh
Charging	66W wired (5300mAh EU model), 5W reverse wired	90W wired
Rear cameras	200MP main, 12MP ultra-wide	50MP main, 8MP ultra-wide
Dimensions	156.5 × 74.6 × 7.3 mm	161 × 75.2 × 8.1 mm
Weight	184 g	204 g
Water resistance	IP65/IP66 (market dependent)	IP68
Supported until	May 2031	Jan 2029

400 full verdict →Redmi Turbo 4 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.