Galaxy F55 5G vs Redmi K70 Ultra

Phone 1

Phone 2

Winner

Samsung Galaxy F55 5G

Lifespan decides this one: the Galaxy F55 5G is supported until May 2029 at $7.08 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: Galaxy F55 5G 73 · 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.

Samsung Galaxy F55 5G $250

Buy with care$7.08/mo

2024◆ Buy-by May 20272029

Xiaomi Redmi K70 Ultra $380

Buy with care$15.17/mo

2024◆ Buy-by Jul 20262028

Category by category

Display

Galaxy F55 5G 70Redmi K70 Ultra 80

The Redmi K70 Ultra's screen is the better one — 6.67-inch amoled, 1.5k, 144hz, 4000 nits peak, dolby vision.

Performance

Galaxy F55 5G 70Redmi K70 Ultra 95

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

Camera

Galaxy F55 5G 67Redmi K70 Ultra 67

Camera systems are comparable on paper — pick by sample photos.

Battery

Galaxy F55 5G 80Redmi K70 Ultra 90

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

Software longevity

Galaxy F55 5G 42Redmi K70 Ultra 30

The Galaxy F55 5G is supported until May 2029 — 10 months longer than the Redmi K70 Ultra.

Value

Galaxy F55 5G 73Redmi K70 Ultra 73

Pound for pound, these two are equally good deals.

Full spec table

Spec	Galaxy F55 5G	Redmi K70 Ultra
Price (street)	$250	$380
Display	6.55-inch Super AMOLED Plus, 1080x2400 (FHD+), 120Hz	6.67-inch AMOLED, 1.5K, 144Hz, 4000 nits peak, Dolby Vision
Chipset	Qualcomm Snapdragon 7 Gen 1	MediaTek Dimensity 9300+ (4nm)
RAM	8GB/12GB	12GB/16GB/24GB
Storage	128GB/256GB	256GB/512GB/1TB
Battery	5,000 mAh	5,500 mAh
Charging	45W wired	120W wired
Rear cameras	50MP main, 8MP ultra-wide, 2MP macro	50MP main, 8MP ultra-wide, 2MP macro
Dimensions	163.9 × 76.5 × 7.8 mm	160.4 × 75.1 × 8.4 mm
Weight	180 g	211 g
Water resistance	None	IP68
Supported until	May 2029	Jul 2028

Galaxy F55 5G 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.