Compare offers from sellers near you
Help

Realme C51s vs Tecno Spark 40

Realme C51s and Tecno Spark 40 are evenly matched - it comes down to what you need

Realme C51s

1.5/10

No price yet

Tecno Spark 40

1.5/10

No price yet

Best for

  • GamingEither - too close to call
  • Keeping it for yearsTecno Spark 40

Head to head

  • Performance
    0.7
    0.6
  • Gaming
    0.9
    1.1
  • Longevity
    0.6
    1.1

    Tecno Spark 40 should get software updates for about 0.8 more years, against about 0.4 for Realme C51s.

  • Connectivity
    3.3
    2.9
  • Extras
    8.2
    7.4
All specifications
Realme C51s
Tecno Spark 40
General
Condition
Available. Released 2024, March 15
Available. Released 2025, July
Model
RMX3765
KM5
Performance
CPU
Unisoc Tiger T612 (12 nm)
Mediatek Helio G81 (12 nm) Mediatek Helio G91 (12 nm) - NFC model
GPU
Mali-G57
Mali-G52 MC2
Display
Resolution
720 x 1600 pixels, 20:9 ratio (~260 ppi density)
720 x 1600 pixels, 20:9 ratio (~263 ppi density)
Camera
Video Resolution
1080p@30fps
1440p@30fps, 1080p@30fps
Battery and power
Charging Port
33W wired, 0-50% in 28 min
45W wired, 55 min to 100%
Connectivity
2G
900 / 1800 / 1900
900 / 1800 / 1900
2G Bands
GSM 850 / 900 / 1800 / 1900
GSM 850 / 900 / 1800 / 1900
3G
2100
2100
3G Bands
HSDPA 900 / 2100
HSDPA 900 / 2100
4G Bands
1, 3, 5, 8, 38, 40
LTE
5G Bands
–
SA/NSA
Bluetooth
5.0, A2DP, LE
Yes
Infrared Port
–
Yes
NFC
Yes, 360˚ (market/region dependent)
Yes (market/region dependent)
Network Technology
HSPA, LTE
HSPA, LTE
Ports
Headphone Jack
Yes
Yes
USB Type
USB Type-C
USB Type-C
Build and size
Build
Glass front, plastic frame, plastic back
Glass front, plastic back, plastic frame
Dimensions
6.74 inches, 109.7 cm 2 (~85.5% screen-to-body ratio)
6.67 inches, 107.4 cm 2 (~84.2% screen-to-body ratio)
Features
FM Radio
Unspecified
FM radio
Questions people ask

Which is better, Realme C51s or Tecno Spark 40?

Realme C51s and Tecno Spark 40 are evenly matched - it comes down to what you need. Realme C51s wins on connectivity and extras; Tecno Spark 40 wins on longevity.

Which will last more years, Realme C51s or Tecno Spark 40?

Tecno Spark 40 should get software updates for about 0.8 more years, against about 0.4 for Realme C51s.

Which is better for keeping it for years, Realme C51s or Tecno Spark 40?

Tecno Spark 40 scores higher for keeping it for years.

Which is newer, Realme C51s or Tecno Spark 40?

Tecno Spark 40 is the newer of the two, released August 2025.

Scores are out of 10 against products released in the last two years, worked out from published specs. Prices are averages of what three or more sellers quoted.