Vivo X21 vs Asus Zenfone 8 Flip

479 USD

479 USD

Discontinued

Available

Vivo Mobiles

Asus Mobiles

X21

Asus Zenfone 8 Flip - ZS672KS

2018, March 08

2021, May 13

GSM / CDMA / HSPA / LTE

GSM / HSPA / LTE / 5G

GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 ,CDMA 800 & TD-SCDMA

GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2

HSDPA 850 / 900 / 1900 / 2100

HSDPA 800 / 850 / 900 / 1700(AWS) / 1900 / 2100

1, 2, 3, 5, 8, 34, 38, 39, 40, 41

1, 2, 3, 4, 5, 7, 8, 12, 17, 18, 19, 20, 26, 28, 34, 38, 39, 40, 41, 42

HSPA 42.2/5.76 Mbps, LTE-A (2CA) Cat6 300/50 Mbps

HSPA 42.2/5.76 Mbps, LTE-A (CA)

1, 2, 3, 5, 7, 8, 12, 20, 28, 38, 77, 78, 77, 78 SA/NSA

154.5 x 74.8 x 7.4 mm (6.08 x 2.94 x 0.29 in)

165 x 77.3 x 9.6 mm (6.50 x 3.04 x 0.38 in)

156.2 g (5.50 oz)

230 g (8.11 oz)

Glass front (Gorilla Glass 3), aluminum back, aluminum frame

Glass front (Gorilla Glass 6), glass back (Gorilla Glass 3), aluminum frame

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

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

Black, Aurora White, Ruby Red

Aurora Black, Pastel White

Super AMOLED capacitive touchscreen, 16M colors

Super AMOLED, 90Hz, HDR10+

6.28 inches, 98.4 cm2 (~85.2% screen-to-body ratio)

6.67 inches, 107.4 cm2 (~84.2% screen-to-body ratio)

1080 x 2280 Pixels, 19:9 ratio (~402 ppi density)

1080 x 2400 pixels, 20:9 ratio (~395 ppi density)

Android 8.1 (Oreo), Funtouch 4

Android 11, ZenUI

Qualcomm SDM660 Snapdragon 660 (14 nm)

Qualcomm SM8350 Snapdragon 888 5G (5 nm)

Octa-core (4x2.2 GHz Kryo 260 Gold & 4x1.8 GHz Kryo 260 Silver)

Octa-core (1x2.84 GHz Kryo 680 & 3x2.42 GHz Kryo 680 & 4x1.80 GHz Kryo 680)

Adreno 512

Adreno 660

6GB

8GB

64GB/128GB

256GB

microSDXC (uses shared SIM slot)

microSDXC (dedicated slot)

12 MP, f/1.8, 1/2.55", 1.4µm, dual pixel PDAF

64 MP, f/1.8, 26mm (wide), 1/1.72", 0.8µm, PDAF, OIS

5 MP, f/2.4, (depth)

8 MP, f/2.4, 80mm (telephoto), PDAF, OIS, 3x optical zoom

Dual Pixel Sensors & AI Face Beauty, f/1.8, 1/2.55, 1.4?, dual pixel PDAF 5 MP, f/2.4, (depth), ,LED flash, HDR, panorama

Dual-LED flash, HDR, auto panorama (motorized rotation)

1080p@30fps

8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS, HDR

12 MP, (macro)

12 MP, f/2.0, (wide), 1/2.8", 1.28µm

Motorized flip-up main camera module

1080p@30fps

8K@30fps, 4K@30/60/120fps, 1080p@30/60/240fps, 720p@480fps; gyro-EIS, HDR

Dual-LED flash, HDR, auto panorama (motorized rotation)

Li-Ion 3200 mAh, non-removable

Li-Po 5000 mAh, non-removable

Fast charging 18W

Fast charging 30W, 60% in 34 min, 100% in 93 min (advertised) USB Power Delivery 3.0

Fingerprint (rear-mounted), accelerometer, proximity, compass

Fingerprint (under display, optical), accelerometer, gyro, proximity, compass

Yes

Yes, with stereo speakers

Yes, 32-bit/192kHz audio

No

Wi-Fi 802.11 a/b/g/n/ac, dual-band, Wi-Fi Direct, hotspot

Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot

5.0, A2DP, LE

5.0, A2DP, LE, aptX Adaptive

A-GPS, GLONASSRadio,FM radio

Yes, with dual-band A-GPS, GLONASS, GALILEO, BDS, QZSS, NavIC

Yes

No

microUSB 2.0, USB On-The-Go

USB Type-C

Yes

AnTuTu: 675851 (v8) | 797848(v9) GeekBench: 3673 (v5.1) GFXBench: 62fps (ES 3.1 onscreen)

Contrast ratio: Infinite (nominal)

-26.8 LUFS (Good)

Endurance rating 98h