Screen size
equal specsA214.0"
A4034.0"
Quick verdict
A403 leads the measured specs 6-3.
Measured wins
A21
3
spec wins
Ties
7
equal specs
A403
6
spec wins
Overall winner
Screen size
equal specsTechnology
A21
GSM / HSPA
A403
GSM / HSPA
2G bands
A21
GSM 900 / 1800 - SIM 1 & SIM 2
A403
GSM 900 / 1800 - SIM 1 & SIM 2
3G bands
A21
HSDPA 2100
A403
HSDPA 2100
Speed
A21
HSPA
A403
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
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
HSPA
Announced
A21
2014. Released 2014
A403
2015, August. Released 2015, August
Status
A21
Discontinued
A403
Discontinued
Dimensions
A21
124.8 x 66.1 x 10.8 mm (4.91 x 2.60 x 0.43 in)
A403
125 x 65 x 10.2 mm (4.92 x 2.56 x 0.40 in)
Weight
A21
115.3 g (4.06 oz)
A403
113 g (3.99 oz)
SIM
A21
Dual SIM (Dual stand-by)
A403
Dual SIM
Type
A21
TFT
A403
TFT, 256K colors
Size
A21
4.0 inches, 47.6 cm2 (~57.8% screen-to-body ratio)
A403
4.0 inches, 45.5 cm2 (~56.1% screen-to-body ratio)
Resolution
A21
320 x 480 pixels, 3:2 ratio (~144 ppi density)
A403
480 x 800 pixels, 5:3 ratio (~233 ppi density)
OS
A21
Android 4.2.2 (Jelly Bean)
A403
Android 4.4.2 (KitKat)
Chipset
A21
Mediatek MT6582 (28 nm)
A403
Spreadtrum SC7715
CPU
A21
Quad-core 1.3 GHz Cortex-A7
A403
1.0 GHz
GPU
A21
Mali-400MP2
A403
-
Card slot
A21
microSDHC
A403
microSDHC
Internal
A21
512MB 256MB RAM
A403
4GB 512MB RAM
Single
A21
3.15 MP
A403
3.15 MP
Video
A21
Yes
A403
Yes
Features
A21
-
A403
LED flash
Single
A21
1.3 MP
A403
1.3 MP
Video
A21
A403
Loudspeaker
A21
Yes
A403
Yes
3.5mm jack
A21
Yes
A403
Yes
WLAN
A21
Wi-Fi 802.11 b/g/n
A403
Wi-Fi 802.11 b/g/n
Bluetooth
A21
4.0, A2DP
A403
2.0
Positioning
A21
No
A403
A-GPS
NFC
A21
No
A403
No
Radio
A21
FM radio
A403
FM radio
USB
A21
microUSB
A403
microUSB 2.0
Sensors
A21
Accelerometer
A403
Accelerometer
Type
A21
Li-Ion 1500 mAh battery
A403
Li-Ion 1400 mAh battery
Stand-by
A21
Up to 120 h (3G)
A403
-
Talk time
A21
Up to 8 h (3G)
A403
-
Colors
A21
Black, Blue, Red
A403
Black, Light Blue, Red, Yellow
SAR EU
A21
0.99 W/kg (head) 1.39 W/kg (body)
A403
0.38 W/kg (head) 0.68 W/kg (body)
Price
A21
About 60 EUR
A403
-