Samsung Galaxy Z Flip4 vs vivo Y21a

Samsung Galaxy Z Flip4

vivo Y21a

Network
2G network

GSM 850, 900, 1800, 1900; CDMA 800, 1900

GSM 850, 900, 1800, 1900
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100; CDMA2000 1xEV-DO

HSDPA 850, 900, 2100
4G network

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 12, 13, 14, 17, 18, 19, 20, 25, 28, 29, 34, 38, 39, 40, 41, 66

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

5G band 1, 3, 20, 41, 77, 78, 79, 81 SA/NSA/Sub6/mmWave

-
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
EV-DO speed

-

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

LTE-A (6CA)

LTE, 301 Mbps download, 151 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic front (opened), glass back (Gorilla Glass Victus+), aluminum frame

Glass front, plastic frame, plastic back
SIM

Nano-SIM, eSIM

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

84.9 mm

164.3 mm
Width

71.9 mm

76.1 mm
Thickness

15.9-17.1 mm

8 mm
Height unfolded

165.2 mm

-
Width unfolded

71.9 mm

-
Thickness unfolded

6.9 mm

-
Weight

187 g

182 g
Payment

Samsung Pay (Visa, MasterCard certified)

-
Waterproof

IPX8, 1.5m and 30 minutes

-
Colors

Blue, Pink Gold, Graphite, Khaki, Navy, Purple, Red, Yellow

Blue, Diamond Glow

Main camera
Camera type

Dual

Dual
Main camera

(wide) , 12 MP, f/1.8 , 83˚ , 24 mm, 1.8 µm, 10x digital zoom

(wide) , 13 MP, f/2.2
(ultrawide) , 12 MP, f/2.2 , 123˚ , 1.12 µm

(macro) , 2 MP, f/2.4
Primary camera resolution

4032 x 3024 pixels

4160 x 3120 pixels
Primary camera video

4K@30/60fps, 1080p@60/240fps, 720p@960fps, HDR10+

1080p@30fps
Primary camera flash

LED flash

LED flash
Camera features

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

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) , 10 MP, f/2.4 , 80˚ , 26 mm, 1.22 µm

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

-

3264 x 2448 pixels
Selfie camera features

Autofocus, face unlock, HDR

Face unlock
Selfie camera video

4K@30fps

1080p@30fps

Connectivity
WLAN

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

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

v5.2

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
NFC

Yes

No
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes