12 4G vs Spark 40 5G

Phone 1

Phone 2

Winner

Tecno Spark 40 5G

The Spark 40 5G wins this one, taking battery and performance decisively. Against the 12 4G it's also the sounder buy at $4.40 per month of safe use.

Value Score: 12 4G 63 · 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.

Realme 12 4G $175

Buy with care$7.16/mo

2024◆ Buy-by Jul 20262028

Tecno Spark 40 5G $115

Buy with care$4.40/mo

2025◆ Buy-by Aug 20262028

Category by category

Display

12 4G 70Spark 40 5G 70

Both displays are effectively the same class.

Performance

12 4G 36Spark 40 5G 55

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

Camera

12 4G 55Spark 40 5G 55

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

Battery

12 4G 80Spark 40 5G 100

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

Software longevity

12 4G 29Spark 40 5G 31

Both phones' support windows end around the same time.

Value

12 4G 63Spark 40 5G 72

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

Full spec table

Spec	12 4G	Spark 40 5G
Price (street)	$175	$115
Display	6.67-inch AMOLED, FHD+, 120Hz, up to 2000 nits peak	6.75-inch IPS LCD, HD+, 120Hz
Chipset	Qualcomm Snapdragon 685 (6nm)	MediaTek Dimensity 6400
RAM	8GB	4GB/8GB
Storage	128GB/256GB	128GB/256GB
Battery	5,000 mAh	6,000 mAh
Charging	67W wired SUPERVOOC	18W wired
Rear cameras	50MP main, 2MP depth	50MP main
Dimensions	163 × 75.5 × 7.9 mm	167.7 × 77.9 × 8 mm
Weight	187 g	194 g
Water resistance	IP54	Not rated
Supported until	Jul 2028	Aug 2028

12 4G 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.