HomTom S99i vs Xiaomi Mi A2

HomTom S99i

Xiaomi Mi A2

Network
2G network

GSM 850, 900, 1800, 1900

GSM 850, 900, 1800, 1900; CDMA 800 & TD-SCDMA
3G network

HSDPA 900, 2100

HSDPA 850, 900, 1900, 2100
4G network

LTE frequency band 1(2100), 3(1800), 7(2600), 8(900), 18(800); LTE-TDD 2300, 2500 2600 MHz

LTE frequency band 1(2100), 3(1800), 5(850), 7(2600), 8(900), 34(2000), 38(2600), 39(1900), 40(2300), 41(2500) - China
HSDPA speed

21 Mbps

-
HSUPA speed

5.76 Mbps

-
HSPA speed

-

HSPA
LTE speed

LTE, Cat4, 150 Mbps download, 51 Mbps upload

LTE
GPRS

Yes

Yes
EDGE

Yes

Yes

Design
Build

Plastic, aluminium alloy

Front glass, aluminum body
SIM

Dual SIM (Nano-SIM/Nano-SIM(microSD))

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

149.5 mm

158.7 mm
Width

70 mm

75.4 mm
Thickness

12.8 mm

7.3 mm
Weight

199 g

168 g
Colors

Black, Silver

Black, Cherry Pink, Flame Red, Glacier Blue, Sand Gold

Display
Display type

IPS

LTPS IPS LCD capacitive touchscreen
Physical size

5.5 inches

5.99 inches
Resolution

720 x 1440 pixels

1080 x 2160 pixels
Pixel density

293 ppi

403 ppi
Display colors

16777216

16777216
Protection

2.5D curved glass screen, GFF full lamination

Corning Gorilla Glass 3
Multitouch

Yes

Yes

Main camera
Camera type

Dual

Dual
Main camera

13 MP

12 MP, f/1.8 , 1/2.9" , 1.25 µm, 2x optical zoom
2 MP

20 MP, f/1.8 , 1/2.8" , 1 µm
Primary camera resolution

4160 x 3120 pixels

4000 x 3000 pixels
Primary camera video

720p@30fps

2160p@30fps, 1080p@30fps, 720p@120fps
Primary camera Autofocus

-

phase detection autofocus
Primary camera flash

LED flash

LED flash
Electronic image stabilization

-

EIS (gyro)
Camera features

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

Geo-tagging, HDR, face detection, panorama, touch focus

Connectivity
WLAN

Wi-Fi 802.11b, 802.11g, 802.11n

Wi-Fi 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac
WLAN WiFi Hotspot

Yes

Yes
WLAN WiFi Direct

-

Yes
WLAN WiFi Dual Band

-

Yes
USB

microUSB 2.0

Type-C 1.0 reversible connector
USB On-The-Go

Yes

-
Bluetooth

v4.0

v5.0
Bluetooth A2DP

Yes

Yes
bluetooth LE

-

Yes
Infrared

-

Yes
GPS

Yes, with A-GPS

Yes, with A-GPS
GLONASS

-

Yes
BDS

-

Yes

Features
Messaging SMS

-

SMS(threaded view)
Messaging MMS

-

MMS
Messaging Email

-

Email
Messaging IM

-

IM
Messaging Push Email

-

Push Email
Sensors

Accelerometer, fingerprint, hall, light, proximity

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