Oppo Find X7 vs vivo Y21a

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800

GSM 850, 900, 1800, 1900
3G network

HSDPA 800, 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1x

HSDPA 850, 900, 2100
4G network

LTE frequency band 1, 3, 4, 5 , 7, 8, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 66

LTE frequency band 1, 3, 5, 8, 38, 40, 41
5G network

5G band 1, 3, 5, 7, 8, 20, 28, 38, 40, 41, 66, 77, 78 SA/NSA

-
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

11.52 Mbps

5.76 Mbps
EV-DO speed

EV-DO 2.4 Mbps download, 0.15 Mbps upload

EV-DO Rev.A 3.1 Mbps download, 1.8 Mbps upload
LTE speed

LTE-A

LTE, 301 Mbps download, 151 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Glass front (Gorilla Glass Victus 2), glass back or eco leather back, aluminum frame

Glass front, plastic frame, plastic back
SIM

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

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

162.7 mm

164.3 mm
Width

75.4 mm

76.1 mm
Thickness

8.7 mm

8 mm
Weight

202/206 g

182 g
Waterproof

IP65

-
Dust proof

IP65

-
Colors

Black, Blue, Brown, Purple

Blue, Diamond Glow

Display
Display type

LTPO AMOLED

IPS LCD
Physical size

6.78 inches

6.51 inches
Resolution

1264 x 2780 pixels

720 x 1600 pixels
Pixel density

450 ppi

270 ppi
Display colors

1073741824

16777216
Protection

Corning Gorilla Glass Victus 2

-
Display features

120Hz, Dolby Vision, HDR10+, 1600 nits (typ), 2300 nits (HBM), 4500 nits (peak)

-

Main camera
Camera type

Triple

Dual
Main camera

(wide) , 50 MP, f/1.6 , 23 mm, 1/1.56" , 1.12 µm

(wide) , 13 MP, f/2.2
(periscope telephoto) , 64 MP, f/2.6 , 70 mm, 1/2.0" , 1.0 µm, 3x optical zoom

(macro) , 2 MP, f/2.4
119˚ , (ultrawide) , 50 MP, f/2.0 , 15 mm, 1/2.76" , 0.64 µm
Primary camera resolution

8120 x 6180 pixels

4160 x 3120 pixels
Primary camera video

4K@30/60fps, 1080p@30/60/240fps; gyro-EIS; HDR, 10‑bit video, Dolby Vision

1080p@30fps
Primary camera flash

LED flash

LED flash
Camera features

Autofocus, continuous autofocus, continuous shooting, digital zoom, optical zoom, digital image stabilization, optical image stabilization, geotagging, panorama, HDR, touch focus, face detection, white balance settings, ISO settings, exposure compensation, self-timer, scene-mode, macro-mode, phase detection autofocus, Hasselblad master mode

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

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 32 MP, f/2.4 , 21 mm, 1/2.74" , 0.8 µm

(wide) , 8 MP, f/1.8
Selfie camera resolution

-

3264 x 2448 pixels
Selfie camera features

Face unlock, digital image stabilization, HDR, autofocus, face detection

Face unlock
Selfie camera video

4K@30fps, 1080p@30fps, gyro-EIS

1080p@30fps

Connectivity
WLAN

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11n 5GHz, 802.11ac, 802.11ax, 802.11be

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

Type-C 2.0

Type-C 2.0
USB On-The-Go

Yes

Yes
Bluetooth

v5.4

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

-
Infrared

Yes

-
NFC

Yes; NFC-SIM, HCE, eSE, eID

No
GPS

Yes, with dual-band A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

Yes

-

Features
Sensors

Accelerometer, color spectrum, compass, fingerprint, gyroscope, proximity

Accelerometer, compass, fingerprint, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

5000 mAh

5000 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

Yes, 100W (50% in 10 min, 100% in 26 min)

Quick Charge, 18W
Reverse charging

-

Yes