PhoneLifespan

P3 Ultra 5G vs Galaxy A15

vs

Winner

Realme P3 Ultra 5G

The P3 Ultra 5G wins this one, taking performance and display decisively. Against the Galaxy A15 it's also the sounder buy at $9.49 per month of safe use.

Value Score: P3 Ultra 5G 74 · Galaxy A15 67 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Realme P3 Ultra 5G $315
Buy with care$9.49/mo
2025◆ Buy-by Mar 20272029
Samsung Galaxy A15 $150
Buy with care$5.00/mo
2023◆ Buy-by Dec 20262028

Category by category

Display
P3 Ultra 5G 70Galaxy A15 50

The P3 Ultra 5G's screen is the better one — 6.83-inch amoled, 1.5k, 120hz, up to 1500 nits peak, gorilla glass 7i.

Performance
P3 Ultra 5G 74Galaxy A15 44

The P3 Ultra 5G's MediaTek Dimensity 8350 Ultra (4nm) is simply the faster chip.

Camera
P3 Ultra 5G 67Galaxy A15 55

The P3 Ultra 5G has the stronger camera system (2 real rear lenses vs 1).

Battery
P3 Ultra 5G 100Galaxy A15 80

6,000mAh vs 5,000mAh — the P3 Ultra 5G lasts longer between charges.

Software longevity
P3 Ultra 5G 40Galaxy A15 36

The P3 Ultra 5G is supported until Mar 2029 — 3 months longer than the Galaxy A15.

Value
P3 Ultra 5G 74Galaxy A15 67

Overall value goes to the P3 Ultra 5G at $9.49 per month of safe use.

Full spec table
SpecP3 Ultra 5GGalaxy A15
Price (street)$315$150
Display6.83-inch AMOLED, 1.5K, 120Hz, up to 1500 nits peak, Gorilla Glass 7i6.5-inch Super AMOLED, FHD+, 90Hz, 800 nits
ChipsetMediaTek Dimensity 8350 Ultra (4nm)MediaTek Helio G99 (6nm)
RAM8GB/12GB4GB/6GB/8GB
Storage128GB/256GB/512GB128GB/256GB
Battery6,000 mAh5,000 mAh
Charging80W wired (100% in 47 min), 5W reverse25W wired
Rear cameras50MP main, 8MP ultra-wide50MP main, 5MP ultra-wide, 2MP macro
Dimensions163.1 × 76.9 × 7.4 mm160.1 × 76.8 × 8.4 mm
Weight183 g200 g
Water resistanceIP68/IP69Not rated
Supported untilMar 2029Dec 2028
P3 Ultra 5G full verdict →Galaxy A15 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.