Galaxy M55 5G vs Redmi K80

Phone 1

Phone 2

Winner

Xiaomi Redmi K80

Lifespan decides this one: the Redmi K80 is supported until Nov 2029 at $8.59 per month of safe use, while the Galaxy M55 5G runs out in Mar 2029 ($8.10/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy M55 5G 72 · Redmi K80 79 — 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 M55 5G $270

Buy with care$8.10/mo

2024◆ Buy-by Mar 20272029

Xiaomi Redmi K80 $355

Safe to buy$8.59/mo

2024◆ Buy-by Nov 20272029

Category by category

Display

Galaxy M55 5G 70Redmi K80 80

The Redmi K80's screen is the better one — 6.67-inch amoled, 2k, 120hz, 3200 nits peak.

Performance

Galaxy M55 5G 70Redmi K80 92

The Redmi K80's Qualcomm Snapdragon 8 Gen 3 (4nm) is simply the faster chip.

Camera

Galaxy M55 5G 67Redmi K80 67

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

Battery

Galaxy M55 5G 80Redmi K80 100

6,550mAh vs 5,000mAh — the Redmi K80 lasts longer between charges.

Software longevity

Galaxy M55 5G 40Redmi K80 49

The Redmi K80 is supported until Nov 2029 — 8 months longer than the Galaxy M55 5G.

Value

Galaxy M55 5G 72Redmi K80 79

Overall value goes to the Redmi K80 at $8.59 per month of safe use.

Full spec table

Spec	Galaxy M55 5G	Redmi K80
Price (street)	$270	$355
Display	6.7-inch Super AMOLED Plus, 1080x2400 (FHD+), 120Hz	6.67-inch AMOLED, 2K, 120Hz, 3200 nits peak
Chipset	Qualcomm Snapdragon 7 Gen 1	Qualcomm Snapdragon 8 Gen 3 (4nm)
RAM	8GB/12GB	12GB/16GB
Storage	128GB/256GB	256GB/512GB/1TB
Battery	5,000 mAh	6,550 mAh
Charging	45W wired	90W wired, 30W wireless
Rear cameras	50MP main, 8MP ultra-wide, 2MP macro	50MP main, 8MP ultra-wide, 2MP macro
Dimensions	163.9 × 76.5 × 7.8 mm	160.3 × 75.0 × 8.0 mm
Weight	180 g	206 g
Water resistance	None	IP68
Supported until	Mar 2029	Nov 2029

Galaxy M55 5G full verdict →Redmi K80 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.