PhoneLifespan

Moto G15 vs Spark 40 5G

vs

Winner

Tecno Spark 40 5G

Lifespan decides this one: the Spark 40 5G is supported until Aug 2028 at $4.40 per month of safe use, while the Moto G15 runs out in Feb 2028 ($8.81/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: Moto G15 65 · Spark 40 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.

Motorola Moto G15 $175
Buy with care$8.81/mo
2025◆ Buy-by Feb 20262028
Tecno Spark 40 5G $115
Buy with care$4.40/mo
2025◆ Buy-by Aug 20262028

Category by category

Display
Moto G15 70Spark 40 5G 70

Both displays are effectively the same class.

Performance
Moto G15 39Spark 40 5G 55

The Spark 40 5G's MediaTek Dimensity 6400 is simply the faster chip.

Camera
Moto G15 55Spark 40 5G 55

Camera systems are comparable on paper — pick by sample photos.

Battery
Moto G15 84Spark 40 5G 100

6,000mAh vs 5,200mAh — the Spark 40 5G lasts longer between charges.

Software longevity
Moto G15 24Spark 40 5G 31

The Spark 40 5G is supported until Aug 2028 — 6 months longer than the Moto G15.

Value
Moto G15 65Spark 40 5G 72

Overall value goes to the Spark 40 5G at $4.40 per month of safe use.

Full spec table
SpecMoto G15Spark 40 5G
Price (street)$175$115
Display6.72-inch IPS LCD, FHD+, 120Hz6.75-inch IPS LCD, HD+, 120Hz
ChipsetMediaTek Helio G81 ExtremeMediaTek Dimensity 6400
RAM4GB/8GB4GB/8GB
Storage128GB/256GB/512GB128GB/256GB
Battery5,200 mAh6,000 mAh
Charging18W wired18W wired
Rear cameras50MP main, 2MP macro50MP main
Dimensions165.7 × 76 × 8.2 mm167.7 × 77.9 × 8 mm
Weight190 g194 g
Water resistanceIP54Not rated
Supported untilFeb 2028Aug 2028
Moto G15 full verdict →Spark 40 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.