BLU S1 vs BLU Vivo XI+

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900
3G network

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

HSDPA 850, 900, 1700(AWS), 1900, 2100
4G network

LTE frequency band 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 12(700), 17(700), 25(1900), 26(850), 41(2500)

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), 66(1700/2100)
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

11.5 Mbps

11 Mbps
LTE speed

-

LTE, Cat6, 301 Mbps download, 51 Mbps upload
LTE-A speed

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

-
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

-

Aluminium alloy, plastic
SIM

Dual SIM (Micro-SIM)

Dual SIM (Micro-SIM/Nano-SIM(microSD), dual stand-by)
Height

147.3 mm

155 mm
Width

72.8 mm

75.5 mm
Thickness

8.4 mm

7.8 mm
Weight

137 g

199 g
Colors

Black, Gold

Black, Silver

Display
Display type

IPS LCD capacitive touchscreen

IPS capacitive touchscreen
Physical size

5.2 inches

6.2 inches
Resolution

720 x 1280 pixels

1080 x 2246 pixels
Pixel density

282 ppi

402 ppi
Display colors

16777216

16777216
Protection

-

Scratch resistant, 2.5D curved glass screen, Corning Gorilla Glass 3
Multitouch

Yes

Yes

Main camera
Camera type

-

Dual
Main camera

13 MP

16 MP, f/2.0 , 1/3" , 1.10 µm
5 MP, 1/5" , 1.12 µm
Primary camera resolution

-

4608 x 3456 pixels
Primary camera video

1080p@30fps

1080p@30fps
Primary camera flash

LED flash

LED flash
Primary camera phase detection autofocus

-

phase detection autofocus
Camera features

Geo-tagging, face detection, touch focus

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

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C reversible connector
USB On-The-Go

-

Yes
Bluetooth

v4.0

v4.1
Bluetooth A2DP

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS

Features
Messaging SMS

SMS(threaded view)

-
Messaging MMS

MMS

-
Messaging Email

Email

-
Messaging IM

IM

-
Messaging Push Email

Push Email

-
Java

No

-
Sensors

Fingerprint (front-mounted), accelerometer, compass, proximity

Accelerometer, compass, fingerprint, gyroscope, iris sensor, light, proximity