Screen size
C820Winner: 8.0"+50%
Q3K Power4.0"
Quick verdict
Q3K Power leads the measured specs 6-3.
Measured wins
C820
3
spec wins
Ties
7
equal specs
Q3K Power
6
spec wins
Overall winner
Screen size
Technology
C820
GSM / HSPA
Q3K Power
GSM / HSPA
2G bands
C820
GSM 900 / 1800 - SIM 1 & SIM 2
Q3K Power
GSM 900 / 1800 - SIM 1 & SIM 2
3G bands
C820
HSDPA 2100
Q3K Power
HSDPA 2100
Speed
C820
HSPA
Q3K Power
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
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
Yes, 384 kbps
Announced
C820
2014
Q3K Power
2015, July. Released 2015, July
Status
C820
Discontinued
Q3K Power
Discontinued
Dimensions
C820
210 x 131 x 10.5 mm (8.27 x 5.16 x 0.41 in)
Q3K Power
125.8 x 65 x 9.8 mm (4.95 x 2.56 x 0.39 in)
Weight
C820
-
Q3K Power
128 g (4.52 oz)
SIM
C820
Dual SIM
Q3K Power
Dual SIM
Type
C820
TFT
Q3K Power
TFT, 256K colors
Size
C820
8.0 inches, 185.6 cm2 (~67.5% screen-to-body ratio)
Q3K Power
4.0 inches, 45.5 cm2 (~55.7% screen-to-body ratio)
Resolution
C820
800 x 1280 pixels, 16:10 ratio (~189 ppi density)
Q3K Power
480 x 800 pixels, 5:3 ratio (~233 ppi density)
OS
C820
Android 4.2.2 (Jelly Bean)
Q3K Power
Android 4.4.2 (KitKat)
CPU
C820
Dual-core 1.0 GHz
Q3K Power
Quad-core 1.2 GHz
Chipset
C820
-
Q3K Power
Spreadtrum 7731G
GPU
C820
-
Q3K Power
Mali-400
Card slot
C820
microSDHC
Q3K Power
microSDHC
Internal
C820
4GB 512MB RAM
Q3K Power
8GB 512MB RAM
Single
C820
3.15 MP
Q3K Power
3.15 MP
Video
C820
Yes
Q3K Power
Yes
Features
C820
-
Q3K Power
LED flash, HDR, panorama
Single
C820
1.3 MP
Q3K Power
1.3 MP
Video
C820
Q3K Power
Loudspeaker
C820
Yes
Q3K Power
Yes
3.5mm jack
C820
Yes
Q3K Power
Yes
WLAN
C820
Wi-Fi 802.11 b/g/n, hotspot
Q3K Power
Wi-Fi 802.11 b/g/n
Bluetooth
C820
2.1
Q3K Power
4.0, A2DP
Positioning
C820
GPS
Q3K Power
GPS
NFC
C820
No
Q3K Power
No
Radio
C820
FM radio
Q3K Power
FM radio
USB
C820
microUSB 2.0
Q3K Power
microUSB 2.0
Sensors
C820
Accelerometer
Q3K Power
Accelerometer
Type
C820
Li-Ion 4000 mAh, non-removable
Q3K Power
Li-Ion 3000 mAh battery
Stand-by
C820
Up to 500 h
Q3K Power
-
Talk time
C820
Up to 14 h
Q3K Power
-
Colors
C820
Black, Silver
Q3K Power
White, black, gold
SAR EU
C820
0.41 W/kg (head) 0.53 W/kg (body)
Q3K Power
-