BLU Bold N1 vs vivo X20

Network
2G network

GSM 850, 900, 1800, 1900

GSM 900, 1800; CDMA 800 & TD-SCDMA
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100

HSDPA 850, 900, 1900, 2100
4G network

LTE frequency band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 28(700)

LTE frequency band 1(2100), 2(1900), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

-
HSUPA speed

5.76 Mbps

-
HSPA speed

-

HSPA
LTE speed

LTE-A (2CA) Cat6, 300 Mbps download, 50 Mbps upload

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Aluminium alloy, glass

-
SIM

Dual SIM (Nano-SIM, dual stand-by)

Hybrid Dual SIM (Nano-SIM, dual stand-by)
Height

158.7 mm

155.9 mm
Width

74.1 mm

75.2 mm
Thickness

8.6 mm

7.2 mm
Weight

182 g

159 g
Colors

Black

Black/Gold, Gold, Matte Black, Rose gold

Display
Display type

AMOLED capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

6.4 inches

6.01 inches
Resolution

1080 x 2340 pixels

1080 x 2160 pixels
Pixel density

403 ppi

402 ppi
Display colors

16777216

16777216
Protection

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 5

-
Multitouch

Yes

Yes

Main camera
Camera type

Dual

Dual
Main camera

16 MP, f/1.8 , 1/2.8"

12 MP, f/1.8
5 MP, f/2.2 , 1/5"

5 MP
Primary camera resolution

4608 x 3456 pixels

-
Primary camera video

1080p@30fps

1080p@30fps
Primary camera Autofocus

-

autofocus
Primary camera flash

LED flash

LED flash
Camera features

Autofocus, digital zoom, geotagging, panorama, HDR, touch focus, face detection, white balance settings, exposure compensation, self-timer, scene-mode, night mode, phase detection

Geo-tagging, HDR, face detection, panorama, touch focus

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5Ghz, 802.11ac

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
Wi-Fi display

Yes

-
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 1.0 reversible connector

microUSB 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v4.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

-

Features
Messaging SMS

-

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

-

Email
Messaging Push Email

-

Push Email
Java

-

No
Sensors

Accelerometer, fingerprint, light, proximity, in-display fingerprint sensor

Fingerprint (rear-mounted), accelerometer, compass, gyro, proximity