HTC U23 vs vivo S15

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800
3G network

HSDPA 850, 900, 1700(AWS), 1900, 2100

HSDPA 850, 900, 1700(AWS), 2100; CDMA2000 1x
4G network

LTE frequency band 1, 3, 5, 7, 8, 12, 17, 20, 28, 38, 39, 40, 41

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

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

5G band 1, 3, 5, 8, 28, 41, 77, 78 SA/NSA
HSDPA speed

42.2 Mbps

42.2 Mbps
HSUPA speed

5.76 Mbps

5.76 Mbps
LTE speed

LTE-A

LTE-A
GPRS

Yes

Yes
EDGE

Yes

Yes

Display
Display type

OLED

AMOLED
Physical size

6.7 inches

6.62 inches
Resolution

1080 x 2400 pixels

1080 x 2400 pixels
Pixel density

393 ppi

398 ppi
Display colors

16777216

16777216
Protection

Corning Gorilla Glass Victus

Scratch resistant, 2.5D curved glass screen
Display features

120Hz

120Hz, HDR10+, 1300 nits (peak)

Hardware
CPU

Octa-core

Octa-core
CPU

Single-core 2.4 GHz Cortex-A710

Single-core 3.2 GHz Kryo 585
CPU(second)

Triple-core 2.36 GHz Cortex-A710

Triple-core 2.42 GHz Kryo 585
CPU(third)

Quad-core 1.8 GHz Cortex-A510

Quad-core 1.80 GHz Kryo 585
Chipset

Qualcomm SM7450-AB Snapdragon 7 Gen 1

Qualcomm SM8250-AC Snapdragon 870 5G
GPU

Adreno 644

Adreno 650
Memory RAM

8 GB

8, 12 GB
Internal storage

128 GB

128, 256 GB
Memory card

microSD, microSDHC, microSDXC

No
Storage

-

UFS 3.1

Main camera
Camera type

Triple

Triple
Main camera

(wide) , 64 MP, f/1.9

(wide) , 64 MP, f/1.9 , 25 mm, 1/1.72"
(ultrawide) , 8 MP, f/2.4 , 120˚ , 1/4.0" , 1.12 µm

(ultrawide) , 8 MP, f/2.2 , 120˚ , 16 mm
(depth) , 2 MP, f/2.4

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

9280 x 6920 pixels

9280 x 6920 pixels
Primary camera video

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

4K@30fps, 1080p@30fps
Primary camera flash

dual-LED flash

LED flash
Camera features

Autofocus, 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

Autofocus, continuous shooting, digital 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, phase detection autofocus

Selfie camera
Selfie camera type

Single

Single
Selfie camera

(wide) , 32 MP, f/2.5 , 1/2.8" , 0.8 µm

(wide) , 32 MP, f/2.0
Selfie camera resolution

6560 x 4928 pixels

-
Selfie camera features

Face unlock, face detection, HDR

Face unlock, autofocus, HDR, face detection, panorama, geotagging, digital image stabilization
Selfie camera video

1080p@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, 802.11ax
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

Yes

Yes
WLAN WiFi Dual Band

Yes

Yes
USB

Type-C 3.0

Type-C 2.0
USB On-The-Go

-

Yes
Bluetooth

v5.2

v5.2
Bluetooth A2DP

Yes

Yes
bluetooth LE

Yes

Yes
Bluetooth AptX

-

aptX HD, aptX Adaptive
NFC

Yes

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

Yes

Yes
GALILEO

Yes

Yes
BDS

Yes

Yes
QZSS

-

Yes