BLU Vivo XI vs Oppo R15x

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

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

HSDPA 850, 900, 1700(AWS), 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), 66(1700/2100)

LTE frequency band 1(2100), 3(1800), 4(1700/2100), 5(850), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500)
HSDPA speed

42.2 Mbps

-
HSUPA speed

11 Mbps

-
LTE speed

LTE, Cat6, 301 Mbps download, 51 Mbps upload

LTE, Cat12, 603 Mbps download, 102 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Aluminium alloy, plastic

Metal, glass
SIM

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

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

149 mm

158.3 mm
Width

72.9 mm

75.5 mm
Thickness

7.9 mm

7.4 mm
Weight

187 g

156 g
Colors

Black, Silver

Blue, Silver

Display
Display type

IPS capacitive touchscreen

Super AMOLED capacitive touchscreen
Physical size

5.9 inches

6.4 inches
Resolution

720 x 1520 pixels

1080 x 2340 pixels
Pixel density

285 ppi

402 ppi
Display colors

16777216

16777216
Protection

2.5D curved glass screen

2.5D curved glass screen, Corning Gorilla Glass 5
Multitouch

Yes

Yes

Main camera
Camera type

Dual

Dual
Main camera

16 MP, f/2.0 , 1/3" , 1.10 µm

16 MP, f/1.7 , 1/2.8" , 1.12 µm
5 MP, 1/5" , 1.12 µm

2 MP, f/2.4
Primary camera resolution

4608 x 3456 pixels

4608 x 3456 pixels
Primary camera video

1080p@30fps

2160p@30fps, 1080p@30fps
Primary camera flash

LED flash

dual-LED flash
Primary camera phase detection autofocus

phase detection autofocus

phase detection autofocus
Camera features

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

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

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz

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

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

microUSB 2.0

microUSB 2.0
USB On-The-Go

-

Yes
Bluetooth

v4.1

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

-

Yes
Bluetooth EDR

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes