Phone (3a) vs Redmi K70 Ultra

Phone 1

Phone 2

Winner

Nothing Phone (3a)

Lifespan decides this one: the Phone (3a) is supported until Mar 2031 at $6.17 per month of safe use, while the Redmi K70 Ultra runs out in Jul 2028 ($15.17/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Phone (3a) 75 · Redmi K70 Ultra 73 — methodology

The lifespan decider

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

Nothing Phone (3a) $349

Safe to buy$6.17/mo

2025◆ Buy-by Mar 20292031

Xiaomi Redmi K70 Ultra $380

Buy with care$15.17/mo

2024◆ Buy-by Jul 20262028

Category by category

Display

Phone (3a) 80Redmi K70 Ultra 80

Both displays are effectively the same class.

Performance

Phone (3a) 64Redmi K70 Ultra 95

The Redmi K70 Ultra's MediaTek Dimensity 9300+ (4nm) is simply the faster chip.

Camera

Phone (3a) 79Redmi K70 Ultra 67

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

Battery

Phone (3a) 80Redmi K70 Ultra 90

5,500mAh vs 5,000mAh — the Redmi K70 Ultra lasts longer between charges.

Software longevity

Phone (3a) 67Redmi K70 Ultra 30

The Phone (3a) is supported until Mar 2031 — 31 months longer than the Redmi K70 Ultra.

Value

Phone (3a) 75Redmi K70 Ultra 73

Pound for pound, these two are equally good deals.

Full spec table

Spec	Phone (3a)	Redmi K70 Ultra
Price (street)	$349	$380
Display	6.77-inch AMOLED, 1080×2392 (FHD+), up to 120Hz, 3000 nits peak	6.67-inch AMOLED, 1.5K, 144Hz, 4000 nits peak, Dolby Vision
Chipset	Snapdragon 7s Gen 3	MediaTek Dimensity 9300+ (4nm)
RAM	8GB/12GB	12GB/16GB/24GB
Storage	128GB/256GB	256GB/512GB/1TB
Battery	5,000 mAh	5,500 mAh
Charging	50W wired, no wireless	120W wired
Rear cameras	50MP main, 50MP telephoto 2x, 8MP ultra-wide	50MP main, 8MP ultra-wide, 2MP macro
Dimensions	163.52 × 77.50 × 8.35 mm	160.4 × 75.1 × 8.4 mm
Weight	201 g	211 g
Water resistance	IP64	IP68
Supported until	Mar 2031	Jul 2028

Phone (3a) full verdict →Redmi K70 Ultra 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.