Screen size
V2 Viper X+5.5"
V4 ViperWinner: 5.7"+3.5%
Quick verdict
V4 Viper leads the measured specs 7-4.
Measured wins
V2 Viper X+
4
spec wins
Ties
6
equal specs
V4 Viper
7
spec wins
Overall winner
Screen size
Technology
V2 Viper X+
GSM / HSPA / LTE
V4 Viper
GSM / HSPA / LTE
2G bands
V2 Viper X+
GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
V4 Viper
GSM 850 / 900 / 1800 / 1900
3G bands
V2 Viper X+
HSDPA 900 / 1900 / 2100
V4 Viper
HSDPA 900 / 2100
4G bands
V2 Viper X+
1, 3, 7, 20, 39, 40, 41
Resolution
Refresh rate
Peak brightness
Pixel density
CPU speed
RAM
Storage
equal specsMain camera
Front 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
V4 Viper
1, 3, 7, 8, 20, 38
Speed
V2 Viper X+
HSPA 21.1/5.76 Mbps, LTE Cat4 150/50 Mbps
V4 Viper
HSPA 42.2/11.5 Mbps, LTE Cat4 150/50 Mbps
Announced
V2 Viper X+
2015, October. Released 2015, October
V4 Viper
2019, September. Released 2019, September
Status
V2 Viper X+
Discontinued
V4 Viper
Discontinued
Dimensions
V2 Viper X+
154 x 77 x 7.2 mm (6.06 x 3.03 x 0.28 in)
V4 Viper
145.8 x 70.9 x 8.5 mm (5.74 x 2.79 x 0.33 in)
Weight
V2 Viper X+
155.3 g (5.47 oz)
V4 Viper
138 g (4.87 oz)
SIM
V2 Viper X+
Dual SIM (Micro-SIM, dual stand-by)
V4 Viper
Nano-SIM + Nano-SIM
Type
V2 Viper X+
AMOLED
V4 Viper
IPS LCD
Size
V2 Viper X+
5.5 inches, 83.4 cm2 (~70.3% screen-to-body ratio)
V4 Viper
5.7 inches, 81.1 cm2 (~78.4% screen-to-body ratio)
Resolution
V2 Viper X+
720 x 1280 pixels, 16:9 ratio (~267 ppi density)
V4 Viper
720 x 1520 pixels, 19:9 ratio (~295 ppi density)
Protection
V2 Viper X+
Corning Gorilla Glass 3
V4 Viper
-
OS
V2 Viper X+
Android 5.1 (Lollipop)
V4 Viper
Android 9.0 (Pie)
Chipset
V2 Viper X+
Mediatek MT6753 (28 nm)
V4 Viper
Mediatek MT6761 Helio A22 (12 nm)
CPU
V2 Viper X+
Octa-core 1.3 GHz Cortex-A53
V4 Viper
Quad-core 2.0 GHz Cortex-A53
GPU
V2 Viper X+
Mali-T720
V4 Viper
PowerVR GE8320
Card slot
V2 Viper X+
microSDXC
V4 Viper
microSDXC (uses shared SIM slot)
Internal
V2 Viper X+
16GB 3GB RAM
V4 Viper
16GB 2GB RAM
Other
V2 Viper X+
-
V4 Viper
eMMC 5.1
Single
V2 Viper X+
13 MP, f/2.0, AF
V4 Viper
-
Features
V2 Viper X+
LED flash, HDR
V4 Viper
LED flash
Video
V2 Viper X+
1080p@30fps
V4 Viper
1080p@30fps
Dual
V2 Viper X+
-
V4 Viper
8 MP, AF Auxiliary lens
Single
V2 Viper X+
5 MP
V4 Viper
5 MP
Video
V2 Viper X+
V4 Viper
Loudspeaker
V2 Viper X+
Yes
V4 Viper
Yes
3.5mm jack
V2 Viper X+
Yes
V4 Viper
Yes
WLAN
V2 Viper X+
Wi-Fi 802.11 b/g/n, hotspot, Wi-Fi Direct
V4 Viper
Wi-Fi 802.11 b/g/n
Bluetooth
V2 Viper X+
4.0, A2DP, EDR
V4 Viper
4.1, A2DP, LE
Positioning
V2 Viper X+
GPS
V4 Viper
GPS, GLONASS
NFC
V2 Viper X+
No
V4 Viper
No
Radio
V2 Viper X+
FM radio
V4 Viper
FM radio
USB
V2 Viper X+
USB Type-C
V4 Viper
microUSB 2.0
Sensors
V2 Viper X+
Accelerometer, proximity, compass
V4 Viper
Fingerprint (rear-mounted), accelerometer, proximity
Type
V2 Viper X+
Li-Po 3150 mAh, removable
V4 Viper
Li-Po 2700 mAh, non-removable
Stand-by
V2 Viper X+
Up to 393 h (3G)
V4 Viper
-
Talk time
V2 Viper X+
Up to 13 h 40 min (3G)
V4 Viper
-
Colors
V2 Viper X+
Dark blue, Golden pearl
V4 Viper
Blue, Red
SAR EU
V2 Viper X+
0.69 W/kg (head)
V4 Viper
1.13 W/kg (head)
Price
V2 Viper X+
About 300 EUR
V4 Viper
About 100 EUR