Screen size
equal specsA214.0"
A4024.0"
Quick verdict
A402 leads the measured specs 7-1.
Measured wins
A21
1
spec wins
Ties
8
equal specs
A402
7
spec wins
Overall winner
Screen size
equal specsTechnology
A21
GSM / HSPA
A402
GSM / HSPA
2G bands
A21
GSM 900 / 1800 - SIM 1 & SIM 2
A402
GSM 900 / 1800 - SIM 1 & SIM 2
3G bands
A21
HSDPA 2100
A402
HSDPA 2100
Speed
A21
HSPA
A402
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
equal specsBattery
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
Yes, 384 kbps
Announced
A21
2014. Released 2014
A402
2015, June. Released 2015, June
Status
A21
Discontinued
A402
Discontinued
Dimensions
A21
124.8 x 66.1 x 10.8 mm (4.91 x 2.60 x 0.43 in)
A402
125.5 x 64 x 10.2 mm (4.94 x 2.52 x 0.40 in)
Weight
A21
115.3 g (4.06 oz)
A402
104 g (3.67 oz)
SIM
A21
Dual SIM (Dual stand-by)
A402
Dual SIM
Type
A21
TFT
A402
TFT, 256K colors
Size
A21
4.0 inches, 47.6 cm2 (~57.8% screen-to-body ratio)
A402
4.0 inches, 45.5 cm2 (~56.7% screen-to-body ratio)
Resolution
A21
320 x 480 pixels, 3:2 ratio (~144 ppi density)
A402
480 x 800 pixels, 5:3 ratio (~233 ppi density)
OS
A21
Android 4.2.2 (Jelly Bean)
A402
Android 4.4.2 (KitKat)
Chipset
A21
Mediatek MT6582 (28 nm)
A402
Spreadtrum 7715
CPU
A21
Quad-core 1.3 GHz Cortex-A7
A402
1.2 GHz
GPU
A21
Mali-400MP2
A402
Mali-400
Card slot
A21
microSDHC
A402
microSDHC
Internal
A21
512MB 256MB RAM
A402
4GB 512MB RAM
Single
A21
3.15 MP
A402
3.15 MP
Video
A21
Yes
A402
Yes
Features
A21
-
A402
LED flash
Single
A21
1.3 MP
A402
1.3 MP
Video
A21
A402
Loudspeaker
A21
Yes
A402
Yes
3.5mm jack
A21
Yes
A402
Yes
WLAN
A21
Wi-Fi 802.11 b/g/n
A402
Wi-Fi 802.11 b/g/n
Bluetooth
A21
4.0, A2DP
A402
4.0, A2DP
Positioning
A21
No
A402
GPS
NFC
A21
No
A402
No
Radio
A21
FM radio
A402
FM radio
USB
A21
microUSB
A402
microUSB 2.0
Sensors
A21
Accelerometer
A402
Accelerometer
Type
A21
Li-Ion 1500 mAh battery
A402
Li-Ion 2000 mAh battery
Stand-by
A21
Up to 120 h (3G)
A402
-
Talk time
A21
Up to 8 h (3G)
A402
-
Colors
A21
Black, Blue, Red
A402
White, Black, Blue, Silver
SAR EU
A21
0.99 W/kg (head) 1.39 W/kg (body)
A402
0.46 W/kg (head) 0.82 W/kg (body)
Price
A21
About 60 EUR
A402
-