Screen size
equal specsA214.0"
Q4054.0"
Quick verdict
Q405 leads the measured specs 4-3.
Measured wins
A21
3
spec wins
Ties
8
equal specs
Q405
4
spec wins
Overall winner
Screen size
equal specsTechnology
A21
GSM / HSPA
Q405
GSM / HSPA
2G bands
A21
GSM 900 / 1800 - SIM 1 & SIM 2
Q405
GSM 900 / 1800 - SIM 1 & SIM 2
3G bands
A21
HSDPA 2100
Q405
HSDPA
Speed
A21
HSPA
Q405
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
Main camera
equal specsFront camera
equal specsBattery
equal specsWired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
USB
5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
HSPA
GPRS
A21
-
Q405
Yes
EDGE
A21
-
Q405
Yes
Announced
A21
2014. Released 2014
Q405
2015, May. Released 2015, May
Status
A21
Discontinued
Q405
Discontinued
Dimensions
A21
124.8 x 66.1 x 10.8 mm (4.91 x 2.60 x 0.43 in)
Q405
124 x 64.2 x 9.9 mm (4.88 x 2.53 x 0.39 in)
Weight
A21
115.3 g (4.06 oz)
Q405
137 g (4.83 oz)
SIM
A21
Dual SIM (Dual stand-by)
Q405
Dual SIM
Type
A21
TFT
Q405
TFT, 256K colors
Size
A21
4.0 inches, 47.6 cm2 (~57.8% screen-to-body ratio)
Q405
4.0 inches, 45.5 cm2 (~57.2% screen-to-body ratio)
Resolution
A21
320 x 480 pixels, 3:2 ratio (~144 ppi density)
Q405
480 x 800 pixels, 5:3 ratio (~233 ppi density)
OS
A21
Android 4.2.2 (Jelly Bean)
Q405
Android 4.4 (KitKat)
Chipset
A21
Mediatek MT6582 (28 nm)
Q405
Spreadtrum 7731
CPU
A21
Quad-core 1.3 GHz Cortex-A7
Q405
Quad-core 1.2 GHz
GPU
A21
Mali-400MP2
Q405
Mali-400
Card slot
A21
microSDHC
Q405
microSDHC
Internal
A21
512MB 256MB RAM
Q405
4GB 512MB RAM
Single
A21
3.15 MP
Q405
3.15 MP
Video
A21
Yes
Q405
Yes
Features
A21
-
Q405
LED flash
Single
A21
1.3 MP
Q405
1.3 MP
Video
A21
Q405
Loudspeaker
A21
Yes
Q405
Yes
3.5mm jack
A21
Yes
Q405
Yes
WLAN
A21
Wi-Fi 802.11 b/g/n
Q405
Wi-Fi 802.11 b/g/n
Bluetooth
A21
4.0, A2DP
Q405
2.0
Positioning
A21
No
Q405
GPS
NFC
A21
No
Q405
No
Radio
A21
FM radio
Q405
FM radio
USB
A21
microUSB
Q405
microUSB
Sensors
A21
Accelerometer
Q405
Accelerometer, proximity
Type
A21
Li-Ion 1500 mAh battery
Q405
Li-Ion 1500 mAh battery
Stand-by
A21
Up to 120 h (3G)
Q405
-
Talk time
A21
Up to 8 h (3G)
Q405
-
Colors
A21
Black, Blue, Red
Q405
Black, White, Gold, Blue
SAR EU
A21
0.99 W/kg (head) 1.39 W/kg (body)
Q405
0.25 W/kg (head) 0.55 W/kg (body)
Price
A21
About 60 EUR
Q405
-