Screen size
A404.0"
A66Winner: 4.5"+11%
Quick verdict
A66 leads the measured specs 5-4.
Measured wins
A40
4
spec wins
Ties
6
equal specs
A66
5
spec wins
Overall winner
Screen size
Technology
A40
GSM
A66
GSM
2G bands
A40
GSM 900 / 1800 - SIM 1 & SIM 2
A66
GSM 900 / 1800 - SIM 1 & SIM 2
GPRS
A40
Yes
A66
Yes
EDGE
A40
Yes
A66
Yes
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Announced
A40
2014, January. Released 2014, January
A66
2014
Status
A40
Discontinued
A66
Discontinued
Dimensions
A40
126.2 x 64 x 10.8 mm (4.97 x 2.52 x 0.43 in)
A66
136 x 67.2 x 11 mm (5.35 x 2.65 x 0.43 in)
Weight
A40
126.5 (4.44 oz)
A66
98 g (3.46 oz)
SIM
A40
Dual SIM
A66
Dual SIM
Type
A40
TFT
A66
TFT
Size
A40
4.0 inches, 45.5 cm2 (~56.4% screen-to-body ratio)
A66
4.5 inches, 55.8 cm2 (~61.1% screen-to-body ratio)
Resolution
A40
480 x 800 pixels, 5:3 ratio (~233 ppi density)
A66
480 x 854 pixels, 16:9 ratio (~218 ppi density)
OS
A40
Android 4.2.2 (Jelly Bean)
A66
Android 4.1.2 (Jelly Bean)
CPU
A40
Dual-core 1.3 GHz
A66
Dual-core 1.2 GHz
Card slot
A40
microSDHC (dedicated slot)
A66
microSDHC
Internal
A40
4GB 512MB RAM
A66
4GB 512MB RAM
Single
A40
5 MP
A66
3.15 MP
Video
A40
Yes
A66
Yes
Features
A40
-
A66
LED flash
Single
A40
VGA
A66
VGA
Video
A40
A66
Loudspeaker
A40
Yes
A66
Yes
3.5mm jack
A40
Yes
A66
Yes
WLAN
A40
Wi-Fi 802.11 b/g/n, hotspot
A66
Wi-Fi 802.11 b/g/n, hotspot
Bluetooth
A40
2.0
A66
2.0
Positioning
A40
GPS
A66
GPS
NFC
A40
No
A66
No
Radio
A40
FM radio
A66
FM radio
USB
A40
microUSB 2.0
A66
microUSB
Sensors
A40
Accelerometer, proximity
A66
Accelerometer, proximity
Type
A40
Li-Ion 1500 mAh battery
A66
Li-Ion 2000 mAh battery
Stand-by
A40
-
A66
Up to 160 h
Talk time
A40
-
A66
Up to 5 h
Colors
A40
White, Yellow, Blue
A66
White, Black
SAR EU
A40
-
A66
0.38 W/kg (head) 0.47 W/kg (body)