Screen size
AX4 NanoWinner: 7.0"+2.9%
V4 Viper Pro6.8"
Quick verdict
V4 Viper Pro leads the measured specs 9-2.
Measured wins
AX4 Nano
2
spec wins
Ties
7
equal specs
V4 Viper Pro
9
spec wins
Overall winner
Screen size
Technology
AX4 Nano
GSM / HSPA
V4 Viper Pro
GSM / HSPA / LTE
2G bands
AX4 Nano
GSM 900 / 1800 / 1900
V4 Viper Pro
GSM 850 / 900 / 1800 / 1900
3G bands
AX4 Nano
HSDPA 900 / 2100
V4 Viper Pro
HSDPA 900 / 2100
Speed
AX4 Nano
HSPA
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
equal specsRAM
Storage
Main camera
Front camera
Battery
Wired charging
Weight
Thickness
IP rating
Wi‑Fi
Bluetooth
equal specsUSB
equal specs5G support
equal specsNFC
equal specs3.5mm jack
equal specsSD card
equal specsStereo speakers
V4 Viper Pro
HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps
4G bands
AX4 Nano
-
V4 Viper Pro
1, 3, 7, 20, 38
Announced
AX4 Nano
2014, January. Released 2014, January
V4 Viper Pro
2020, January. Released 2020, January
Status
AX4 Nano
Discontinued
V4 Viper Pro
Discontinued
Dimensions
AX4 Nano
190.9 x 107.8 x 9.3 mm (7.52 x 4.24 x 0.37 in)
V4 Viper Pro
171 x 82 x 8.8 mm (6.73 x 3.23 x 0.35 in)
Weight
AX4 Nano
256.2 g (9.03 oz)
V4 Viper Pro
191.6 g (6.77 oz)
SIM
AX4 Nano
Mini-SIM
V4 Viper Pro
Nano-SIM + Nano-SIM
Type
AX4 Nano
IPS LCD
V4 Viper Pro
IPS LCD
Size
AX4 Nano
7.0 inches, 139.5 cm2 (~67.8% screen-to-body ratio)
V4 Viper Pro
6.8 inches, 115.4 cm2 (~82.3% screen-to-body ratio)
Resolution
AX4 Nano
480 x 800 pixels, 5:3 ratio (~133 ppi density)
V4 Viper Pro
640 x 1352 pixels, 19:9 ratio (~220 ppi density)
OS
AX4 Nano
Android 4.2 (Jelly Bean)
V4 Viper Pro
Android 9.0 (Pie)
CPU
AX4 Nano
Dual-core 1.3 GHz Cortex-A7
V4 Viper Pro
Quad-core 1.3 GHz Cortex-A53
GPU
AX4 Nano
Mali-400
V4 Viper Pro
PowerVR GE8100
Chipset
AX4 Nano
-
V4 Viper Pro
Mediatek MT6739 (28 nm)
Card slot
AX4 Nano
microSDHC (dedicated slot)
V4 Viper Pro
microSDXC (uses shared SIM slot)
Internal
AX4 Nano
4GB 512MB RAM
V4 Viper Pro
32GB 2GB RAM
Other
AX4 Nano
-
V4 Viper Pro
eMMC 5.1
Single
AX4 Nano
3.15 MP
V4 Viper Pro
-
Video
AX4 Nano
Yes
V4 Viper Pro
1080p@30fps
Dual
AX4 Nano
-
V4 Viper Pro
13 MP, AF Auxiliary lens
Features
AX4 Nano
-
V4 Viper Pro
LED flash
Single
AX4 Nano
1 MP
V4 Viper Pro
8 MP
Video
AX4 Nano
V4 Viper Pro
1080p@30fps
Loudspeaker
AX4 Nano
Yes
V4 Viper Pro
Yes
3.5mm jack
AX4 Nano
Yes
V4 Viper Pro
Yes
WLAN
AX4 Nano
Wi-Fi 802.11 b/g/n, Wi-Fi Direct, hotspot
V4 Viper Pro
Wi-Fi 802.11 b/g/n
Bluetooth
AX4 Nano
4.0, A2DP, EDR
V4 Viper Pro
4.0, A2DP
Positioning
AX4 Nano
GPS
V4 Viper Pro
GPS, GLONASS
NFC
AX4 Nano
No
V4 Viper Pro
No
Radio
AX4 Nano
FM Radio
V4 Viper Pro
FM radio
USB
AX4 Nano
microUSB 2.0
V4 Viper Pro
microUSB 2.0
Sensors
AX4 Nano
Accelerometer
V4 Viper Pro
Fingerprint (rear-mounted), accelerometer, proximity
Type
AX4 Nano
Li-Po 2500 mAh, non-removable
V4 Viper Pro
Li-Po 3500 mAh
Stand-by
AX4 Nano
Up to 250 h
V4 Viper Pro
-
Talk time
AX4 Nano
Up to 4 h
V4 Viper Pro
-
Charging
AX4 Nano
-
V4 Viper Pro
10W wired
Colors
AX4 Nano
Black, White
V4 Viper Pro
Dark Grey
SAR EU
AX4 Nano
-
V4 Viper Pro
1.20 W/kg (head)
Price
AX4 Nano
-
V4 Viper Pro
About 170 EUR