Comparison of Allview V4 Viper and Karbonn A27 Retina

Attribute	Allview V4 Viper ×	Karbonn A27 Retina ×
General
Brand	Allview	Karbonn
Launch
Announced	2019-09-01	2013-03-01
Body
Width (mm)	8.5	9.1
Length (mm)	145.8	133.6
Height (mm)	70.9	66
Weight (g)	138	126.5
SIM	Hybrid Dual SIM (Nano-SIM, dual stand-by)	Dual SIM (Mini-SIM)
Network
Technology	GSM HSPA LTE	GSM HSPA
2G bands	GSM 850 / 900 / 1800 / 1900	GSM 900 / 1800 / 1900
3G bands	HSDPA 900 / 2100	HSDPA 2100
4G bands	1, 3, 7, 8, 20, 38	-
Speed	HSPA 42.2/11.5 Mbps LTE Cat4 150/50 Mbps	HSPA 7.2/0.384 Mbps
Platform
OS	Android 9.0 (Pie)	Android 4.1 (Jelly Bean)
Chipset	Mediatek MT6761 Helio A22 (12 nm)	-
CPU	Quad-core 2.0 GHz Cortex-A53	Dual-core 1.2 GHz
GPU	PowerVR GE8320	-
Memory
Card slot	microSDXC (uses shared SIM slot)	microSDHC (dedicated slot)
Internal	16GB 2GB RAM	4GB 512MB RAM
Display
Size (in)	5.7	4.3
Resolution (px)	720 x 1520	540 x 960
Display Type	IPS LCD	IPS LCD
Battery
Type	Li-Po	Li-Ion
Capcity (mAh)	2700	1800
Main Camera
Main Camera Type	Dual	Single
Main Camera Properties	0.3 MP, (depth) 8 MP, AF	8 MP, AF
Main Camera Video	1080p@30fps	Yes
Main Camera Features	LED flash	LED flash
Selfie Camera
Selfie Camera Type	Single	Single
Selfie Camera Properties	5 MP	2 MP
Comms
WLAN	Wi-Fi 802.11 b/g/n, hotspot	Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
Bluetooth	4.1, A2DP, LE	Yes
GPS	+	+
NFC	-	-
Radio	FM radio	FM radio
USB	microUSB 2.0	Proprietary
Sound
Loudspeaker	+	+
3.5mm jack	+	+
Features
Sensors	Fingerprint (rear-mounted) accelerometer proximity	Accelerometer
Misc
Colors	Blue Red	Black
SAR EU Head (W/kg)	1.13	1
Stand-by (h)	-	180
Talk time (h)	-	Up to 4 h