400 vs P3 Ultra 5G

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 P3 Ultra 5G runs out in Mar 2029 ($9.49/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: 400 76 · P3 Ultra 5G 74 — 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

Realme P3 Ultra 5G $315

Buy with care$9.49/mo

2025◆ Buy-by Mar 20272029

Category by category

Display

400 80P3 Ultra 5G 70

The 400's screen is the better one — 6.55-inch amoled, 1.5k, 120hz, 5000 nits peak.

Performance

400 64P3 Ultra 5G 74

The P3 Ultra 5G's MediaTek Dimensity 8350 Ultra (4nm) is simply the faster chip.

Camera

400 72P3 Ultra 5G 67

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

Battery

400 86P3 Ultra 5G 100

6,000mAh vs 5,300mAh — the P3 Ultra 5G lasts longer between charges.

Software longevity

400 70P3 Ultra 5G 40

The 400 is supported until May 2031 — 26 months longer than the P3 Ultra 5G.

Value

400 76P3 Ultra 5G 74

Pound for pound, these two are equally good deals.

Full spec table

Spec	400	P3 Ultra 5G
Price (street)	$350	$315
Display	6.55-inch AMOLED, 1.5K, 120Hz, 5000 nits peak	6.83-inch AMOLED, 1.5K, 120Hz, up to 1500 nits peak, Gorilla Glass 7i
Chipset	Qualcomm Snapdragon 7 Gen 3 (4nm)	MediaTek Dimensity 8350 Ultra (4nm)
RAM	8GB/12GB	8GB/12GB
Storage	256GB/512GB	128GB/256GB/512GB
Battery	5,300 mAh	6,000 mAh
Charging	66W wired (5300mAh EU model), 5W reverse wired	80W wired (100% in 47 min), 5W reverse
Rear cameras	200MP main, 12MP ultra-wide	50MP main, 8MP ultra-wide
Dimensions	156.5 × 74.6 × 7.3 mm	163.1 × 76.9 × 7.4 mm
Weight	184 g	183 g
Water resistance	IP65/IP66 (market dependent)	IP68/IP69
Supported until	May 2031	Mar 2029

400 full verdict →P3 Ultra 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.