Galaxy M55 5G vs Galaxy S25 Ultra

Phone 1

Phone 2

Winner

Samsung Galaxy S25 Ultra

Lifespan decides this one: the Galaxy S25 Ultra is supported until Feb 2032 at $13.30 per month of safe use, while the Galaxy M55 5G runs out in Mar 2029 ($8.07/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy M55 5G 73 · Galaxy S25 Ultra 75 — 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$8.07/mo

2024◆ Buy-by Mar 20272029

Samsung Galaxy S25 Ultra $902

Safe to buy$13.30/mo

2025◆ Buy-by Feb 20302032

Category by category

Display

Galaxy M55 5G 70Galaxy S25 Ultra 100

The Galaxy S25 Ultra's screen is the better one — 6.9-inch dynamic ltpo amoled 2x, qhd+, 1–120hz, up to 2600 nits.

Performance

Galaxy M55 5G 70Galaxy S25 Ultra 98

The Galaxy S25 Ultra's Snapdragon 8 Elite for Galaxy is simply the faster chip.

Camera

Galaxy M55 5G 67Galaxy S25 Ultra 96

The Galaxy S25 Ultra has the stronger camera system (4 real rear lenses vs 2).

Battery

Galaxy M55 5G 80Galaxy S25 Ultra 80

Battery capacities are close enough not to decide this.

Software longevity

Galaxy M55 5G 40Galaxy S25 Ultra 81

The Galaxy S25 Ultra is supported until Feb 2032 — 34 months longer than the Galaxy M55 5G.

Value

Galaxy M55 5G 73Galaxy S25 Ultra 75

Pound for pound, these two are equally good deals.

Full spec table

Spec	Galaxy M55 5G	Galaxy S25 Ultra
Price (street)	$270	$902
Display	6.7-inch Super AMOLED Plus, 1080x2400 (FHD+), 120Hz	6.9-inch Dynamic LTPO AMOLED 2X, QHD+, 1–120Hz, up to 2600 nits
Chipset	Qualcomm Snapdragon 7 Gen 1	Snapdragon 8 Elite for Galaxy
RAM	8GB/12GB	12GB
Storage	128GB/256GB	256GB/512GB/1TB
Battery	5,000 mAh	5,000 mAh
Charging	45W wired	45W wired (65% in 30 min), 15W wireless (Qi2 Ready), 4.5W reverse wireless
Rear cameras	50MP main, 8MP ultra-wide, 2MP macro	200MP main, 50MP ultra-wide, 10MP telephoto 3x, 50MP periscope 5x
Dimensions	163.9 × 76.5 × 7.8 mm	162.8 × 77.6 × 8.2 mm
Weight	180 g	218 g
Water resistance	None	IP68
Supported until	Mar 2029	Feb 2032

Galaxy M55 5G full verdict →Galaxy S25 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.