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vivo NEX S
vivo · phone

NEX S

Oppo A91
Oppo · phone

A91

3

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Launch

2
Announced
2018-06-01
2019-12-20
Status
Available
Available

Network

4
2G bands
  • DCS-1800
  • P-GSM-900
  • GSM-850
  • T-GSM-900
  • R-GSM-900
  • E-GSM-900
  • P-GSM-900
  • GSM-850
  • DCS-1800
  • T-GSM-900
  • R-GSM-900
  • E-GSM-900
3G bands
  • B8 (900 MHz)
  • B5 (850 MHz)
  • B2 (1900 MHz)
  • B26 (850 MHz)
  • B25 (1900 MHz)
  • B2 (1900 MHz)
  • B25 (1900 MHz)
  • B26 (850 MHz)
  • B5 (850 MHz)
4G bands
  • B18 (850 MHz)
  • B38 (2600 MHz)
  • B1 (2100 MHz)
  • B7 (2600 MHz)
  • B3 (1800 MHz)
  • B25 (1900 MHz)
  • B28 (700 MHz)
  • B26 (850 MHz)
  • B28 (700 MHz)
  • B38 (2600 MHz)
  • B7 (2600 MHz)
  • B40 (2300 MHz)
  • B5 (850 MHz)
  • B8 (900 MHz)
  • B20 (800 MHz)
  • B1 (2100 MHz)
SIM
  • Dual SIM (Nano-SIM)
  • Dual SIM (Nano-SIM)

Body

8
Height
162 mm
160.2 mm
Width
77 mm
73.3 mm
Thickness
8 mm
7.9 mm
Weight
199 g
172 g
Colors
  • Red
  • Black
  • Unicorn White
  • Red
  • Blazing Blue
  • Lightening Black
Back material
Plastic
Plastic
Frame material
Glass
Plastic
QWERTY keyboard
✕ No
✕ No

Platform

2
OS
Android 8.1 Oreo
Android 9.0 Pie
Chipset
Snapdragon 845
Helio P70

Memory

3
Memory
  • 8GB RAM, 128GB
  • 8GB RAM, 256GB
  • 4GB RAM, 128GB
  • 8GB RAM, 128GB
  • 8GB RAM, 256GB
Dedicated card slot
✕ No
✓ Yes
Card slot
–
microSDXC

Display

8
Size
6.59"
6.4"
Resolution width
1080 px
1080 px
Resolution height
2316 px
2400 px
Pixel density
388 ppi
408 ppi
High refresh rate
✕ No
✕ No
Screen-to-body ratio
86%
85.5%
Technology
Super AMOLED
AMOLED
Display area
–
100.4 cm²

Main camera

5
Cameras
  • 12MP, f/1.8, standard, OIS, PDAF, AF
  • 5MP, f/2.4, depth
  • 48MP, f/2, wide, PDAF
  • 8MP, ultrawide
  • 2MP, depth
  • 2MP, standard
Flash
Dual-LED dual-tone
LED
Video
  • 1080p@30fps
  • 4K@30fps
1080p@30fps
HDR
✓ Yes
✓ Yes
Panorama
✓ Yes
✓ Yes

Selfie camera

4
Cameras
  • 8MP, f/2.4, No, AF
  • 16MP, wide, AF
Video
1080p@30fps
1080p@30fps
HDR
✕ No
✓ Yes
Pop-up camera
✓ Yes
✕ No

Sound

3
3.5mm jack
✓ Yes
✓ Yes
Stereo speakers
✕ No
✕ No
Loudspeaker
✓ Yes
✓ Yes

Sensors

7
Fingerprint
under display
under display
Gyroscope
✓ Yes
✓ Yes
Compass
✓ Yes
✓ Yes
Barometer
✕ No
✕ No
Heart rate
✕ No
✕ No
Accelerometer
✓ Yes
✓ Yes
Proximity
✓ Yes
✓ Yes

Connectivity

7
Wi-Fi
  • Wi‑Fi 6 (802.11ax) (600–9608 Mbit/s)
  • Wi‑Fi 6E (802.11ax) (600–9608 Mbit/s)
  • 802.11b (1–11 Mbit/s)
  • Wi‑Fi 5 (802.11ac) (433–6933 Mbit/s)
  • Wi‑Fi 4 (802.11n) (72–600 Mbit/s)
  • 802.11g (6–54 Mbit/s)
  • 802.11a (6–54 Mbit/s)
  • 802.11b (1–11 Mbit/s)
  • Wi‑Fi 5 (802.11ac) (433–6933 Mbit/s)
  • Wi‑Fi 4 (802.11n) (72–600 Mbit/s)
  • Wi‑Fi 6E (802.11ax) (600–9608 Mbit/s)
  • 802.11a (6–54 Mbit/s)
  • 802.11g (6–54 Mbit/s)
  • Wi‑Fi 6 (802.11ax) (600–9608 Mbit/s)
Bluetooth
Bluetooth 5.0
Bluetooth 4.2
USB
USB Type-C 2.0
USB Type-C 2.0
GPS
✓ Yes
✓ Yes
NFC
✕ No
✕ No
Infrared port
✕ No
✕ No
FM radio
✕ No
✓ Yes

Battery

5
Capacity
4000 mAh
4025 mAh
Type
Li-ion
Li-Po
Charging power
22.5 W
20 W
Removable
✕ No
✕ No
Wireless charging
✕ No
✕ No