Phone (3a) Pro vs Galaxy M55 5G

Phone 1

Phone 2

Winner

Nothing Phone (3a) Pro

Lifespan decides this one: the Phone (3a) Pro is supported until Mar 2031 at $7.60 per month of safe use, while the Galaxy M55 5G runs out in Mar 2029 ($8.12/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Phone (3a) Pro 71 · Galaxy M55 5G 72 — 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) Pro $429

Safe to buy$7.60/mo

2025◆ Buy-by Mar 20292031

Samsung Galaxy M55 5G $270

Buy with care$8.12/mo

2024◆ Buy-by Mar 20272029

Category by category

Display

Phone (3a) Pro 80Galaxy M55 5G 70

The Phone (3a) Pro's screen is the better one — 6.77-inch amoled, 1080×2392 (fhd+), up to 120hz, 3000 nits peak.

Performance

Phone (3a) Pro 64Galaxy M55 5G 70

The Galaxy M55 5G's Qualcomm Snapdragon 7 Gen 1 is simply the faster chip.

Camera

Phone (3a) Pro 79Galaxy M55 5G 67

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

Battery

Phone (3a) Pro 80Galaxy M55 5G 80

Battery capacities are close enough not to decide this.

Software longevity

Phone (3a) Pro 67Galaxy M55 5G 40

The Phone (3a) Pro is supported until Mar 2031 — 23 months longer than the Galaxy M55 5G.

Value

Phone (3a) Pro 71Galaxy M55 5G 72

Pound for pound, these two are equally good deals.

Full spec table

Spec	Phone (3a) Pro	Galaxy M55 5G
Price (street)	$429	$270
Display	6.77-inch AMOLED, 1080×2392 (FHD+), up to 120Hz, 3000 nits peak	6.7-inch Super AMOLED Plus, 1080x2400 (FHD+), 120Hz
Chipset	Snapdragon 7s Gen 3	Qualcomm Snapdragon 7 Gen 1
RAM	12GB	8GB/12GB
Storage	256GB	128GB/256GB
Battery	5,000 mAh	5,000 mAh
Charging	50W wired, no wireless	45W wired
Rear cameras	50MP main, 50MP periscope telephoto 3x, 8MP ultra-wide	50MP main, 8MP ultra-wide, 2MP macro
Dimensions	163.52 × 77.50 × 8.39 mm	163.9 × 76.5 × 7.8 mm
Weight	211 g	180 g
Water resistance	IP64	None
Supported until	Mar 2031	Mar 2029

Phone (3a) Pro full verdict →Galaxy M55 5G 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.