Galaxy M55 5G vs Galaxy S23 Ultra

Phone 1

Phone 2

Winner

Samsung Galaxy M55 5G

Lifespan decides this one: the Galaxy M55 5G is supported until Mar 2029 at $8.07 per month of safe use, while the Galaxy S23 Ultra runs out in Feb 2028 ($16.82/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy M55 5G 73 · Galaxy S23 Ultra 76 — 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 S23 Ultra $339

Buy with care$16.82/mo

2023◆ Buy-by Feb 20262028

Category by category

Display

Galaxy M55 5G 70Galaxy S23 Ultra 90

The Galaxy S23 Ultra's screen is the better one — 6.8-inch dynamic amoled 2x, qhd+, ltpo 1–120hz, 1750 nits peak.

Performance

Galaxy M55 5G 70Galaxy S23 Ultra 85

The Galaxy S23 Ultra's Snapdragon 8 Gen 2 for Galaxy is simply the faster chip.

Camera

Galaxy M55 5G 67Galaxy S23 Ultra 96

The Galaxy S23 Ultra has the stronger camera system (4 real rear lenses vs 2).

Battery

Galaxy M55 5G 80Galaxy S23 Ultra 80

Battery capacities are close enough not to decide this.

Software longevity

Galaxy M55 5G 40Galaxy S23 Ultra 24

The Galaxy M55 5G is supported until Mar 2029 — 13 months longer than the Galaxy S23 Ultra.

Value

Galaxy M55 5G 73Galaxy S23 Ultra 76

Pound for pound, these two are equally good deals.

Full spec table

Spec	Galaxy M55 5G	Galaxy S23 Ultra
Price (street)	$270	$339
Display	6.7-inch Super AMOLED Plus, 1080x2400 (FHD+), 120Hz	6.8-inch Dynamic AMOLED 2X, QHD+, LTPO 1–120Hz, 1750 nits peak
Chipset	Qualcomm Snapdragon 7 Gen 1	Snapdragon 8 Gen 2 for Galaxy
RAM	8GB/12GB	8GB/12GB
Storage	128GB/256GB	256GB/512GB/1TB
Battery	5,000 mAh	5,000 mAh
Charging	45W wired	45W wired, 15W wireless, 4.5W reverse wireless
Rear cameras	50MP main, 8MP ultra-wide, 2MP macro	200MP main, 12MP ultra-wide, 10MP telephoto 3x, 10MP periscope 10x
Dimensions	163.9 × 76.5 × 7.8 mm	163.4 × 78.1 × 8.9 mm
Weight	180 g	234 g
Water resistance	None	IP68
Supported until	Mar 2029	Feb 2028

Galaxy M55 5G full verdict →Galaxy S23 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.