Realme GT2 vs vivo V21

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 1xEV-DO

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

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 18, 19, 26, 28, 34, 38, 39, 40, 41

LTE frequency band 1, 2, 3, 4, 5, 7, 8, 20, 28, 38, 39, 40, 41
5G network

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

-
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

LTE-A, 1200 Mbps download, 150 Mbps upload
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic

Glass front, plastic frame, plastic back
SIM

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

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

162.9 mm

159.7 mm
Width

75.8 mm

73.9 mm
Thickness

8.6 mm

7.3 mm
Weight

194.5/199.8 g

176 g
Colors

Black, Blue, Green, White

Blue, Sunset Dazzle

Display
Display type

AMOLED

AMOLED
Physical size

6.62 inches

6.44 inches
Resolution

1080 x 2400 pixels

1080 x 2400 pixels
Pixel density

398 ppi

409 ppi
Display colors

1073741824

16777216
Protection

Corning Gorilla Glass 5

Scratch resistant, 2.5D curved glass screen
Display features

120Hz, 1300 nits (peak)

-

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 50 MP, f/1.8 , 84˚ , 24 mm, 1/1.56" , 1.0 µm

(wide) , 64 MP, f/1.8 , 26 mm, 1/1.72" , 0.8 µm
(ultrawide) , 8 MP, f/2.2 , 119˚

(ultrawide) , 8 MP, f/2.2 , 120˚ , 16 mm, 1/4.0" , 1.12 µm
(macro) , 2 MP, 40 mm

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

8192 x 6144 pixels

9280 x 6920 pixels
Primary camera video

4K, 1080p, gyro-EIS

4K@30fps (no OIS), 1080p@30/60fps
Primary camera flash

dual-LED dual-tone flash

LED flash
Camera features

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, ProLight

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) , 16 MP, f/2.5 , 78˚ , 26 mm, 1/3" , 1.0 µm

(wide) , 44 MP, f/2.0
Selfie camera resolution

4608 x 3456 pixels

-
Selfie camera features

Face unlock, HDR, panorama

Autofocus, face unlock, HDR
Selfie camera video

1080p@30fps

4K@30fps (no OIS), 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

v5.1
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

aptX HD

-
NFC

Yes

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, gyroscope, proximity

Battery
Battery type

Li-Po

Li-Po
Battery capacity

5000 mAh

4000 mAh
Battery removable

Non-removable

Non-removable
Fast battery charging

SuperDart Charge, 65W (100% in 33 min)

Yes (63% in 30 min)