Galaxy M15 5G vs Galaxy S26 Ultra

Phone 1

Phone 2

Winner

Samsung Galaxy S26 Ultra

Lifespan decides this one: the Galaxy S26 Ultra is supported until Mar 2033 at $13.62 per month of safe use, while the Galaxy M15 5G runs out in Apr 2029 ($4.47/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Galaxy M15 5G 71 · Galaxy S26 Ultra 77 — 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 M15 5G $150

Buy with care$4.47/mo

2024◆ Buy-by Apr 20272029

Samsung Galaxy S26 Ultra $1099

Safe to buy$13.62/mo

2026◆ Buy-by Mar 20312033

Category by category

Display

Galaxy M15 5G 50Galaxy S26 Ultra 100

The Galaxy S26 Ultra's screen is the better one — 6.9-inch dynamic ltpo amoled 2x, qhd+, 1–120hz, up to 2600 nits, with anti-reflective privacy display.

Performance

Galaxy M15 5G 38Galaxy S26 Ultra 100

The Galaxy S26 Ultra's Snapdragon 8 Elite Gen 5 for Galaxy is simply the faster chip.

Camera

Galaxy M15 5G 55Galaxy S26 Ultra 96

The Galaxy S26 Ultra has the stronger camera system (4 real rear lenses vs 1).

Battery

Galaxy M15 5G 100Galaxy S26 Ultra 80

6,000mAh vs 5,000mAh — the Galaxy M15 5G lasts longer between charges.

Software longevity

Galaxy M15 5G 40Galaxy S26 Ultra 96

The Galaxy S26 Ultra is supported until Mar 2033 — 47 months longer than the Galaxy M15 5G.

Value

Galaxy M15 5G 71Galaxy S26 Ultra 77

Overall value goes to the Galaxy S26 Ultra at $13.62 per month of safe use.

Full spec table

Spec	Galaxy M15 5G	Galaxy S26 Ultra
Price (street)	$150	$1099
Display	6.5-inch Super AMOLED, 1080 x 2340 (FHD+), 90Hz	6.9-inch Dynamic LTPO AMOLED 2X, QHD+, 1–120Hz, up to 2600 nits, with anti-reflective Privacy Display
Chipset	MediaTek Dimensity 6100+	Snapdragon 8 Elite Gen 5 for Galaxy
RAM	4GB/6GB/8GB	12GB
Storage	128GB/256GB	256GB/512GB/1TB
Battery	6,000 mAh	5,000 mAh
Charging	25W wired	60W wired, 25W wireless
Rear cameras	50MP main, 5MP ultra-wide, 2MP macro	200MP main, 50MP ultra-wide, 10MP telephoto 3x, 50MP telephoto 5x periscope
Dimensions	160.1 × 76.8 × 9.3 mm	163.6 × 78.1 × 7.9 mm
Weight	217 g	214 g
Water resistance	None	IP68
Supported until	Apr 2029	Mar 2033

Galaxy M15 5G full verdict →Galaxy S26 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.