Xiaomi Redmi Note 9 (128GB/6GB) vs Acer Liquid S2 (S520)

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Side by side comparison between Xiaomi Redmi Note 9 vs Acer Liquid S2 phones, differences, pros, cons and full specifications. What's the better?

8/4/2020 2:46 PM, updated: 1/19/2023 2:42 AM

Compare Acer Liquid S2 X Xiaomi Redmi Note 9 (128GB/6GB) 22Points

Specifications Compare Models Pictures

6.53"
IPS

1080x2340

48
MP

13mp

6GB
RAM

Octa-core

5020
mAh

(Non removable)

04Points Acer Liquid S2 (S520) Compare Xiaomi Redmi Note 9 X

Specifications Compare Models Pictures

6"
IPS

1080x1920

13
MP

2.1mp

2GB
RAM

Quad-core

3300
mAh

(Non removable)

What's the better phone? Xiaomi Redmi Note 9 (128GB/6GB)

The phonemore's choice is much more technical than personal. Therefore, you shouldn't only consider this. Our goal is to help you, but what's important to us may not be important to you. You decide which one is the best! Comment!

22 Advantages Xiaomi Redmi Note 9 (128GB/6GB)	vs	4 Advantages Acer Liquid S2 (S520)
+2GHz 64bit Octa-core (12nm)36% More powerful processor, you can open your applications faster	vs	2.2GHz 32bit Quad-core
+6GB LPDDR4X2 times More RAM memory. Typically more responsive and better for multitasking.	vs	2GB LPDDR3
+128GB (106GB available)8 times More internal storage for applications and files	vs	16GB (12GB available)
+Until 512GB microSD, microSDXC7 times More external storage for files using memory cards	vs	Until 64GB microSD, microSDXC
+199 grams (6.97 ounces)16% Lighter	vs	231 grams (8.09 ounces)
+8.9 millimeters (0.35 inches)1% Thinner	vs	9 millimeters (0.35 inches)
+1080x2340 pixels22% Higher resolution screen	vs	1080x1920 pixels
+395 PPI8% Crisper display of text, images and videos because it has more pixels per inch (ppi)	vs	367 PPI
+6.53"9% Larger screen	vs	6"
+(quad camera) 48MP + 8MP + 2MP + 2MP4 times Higher resolution main camera	vs	(back) 13MP
+HDR photo on both camerasAdvantage The HDR technology produced photos with more detail in dark areas	vs	HDR photo only main camera
+(front) 13MP5 times Higher resolution secondary camera to take pictures and selfies	vs	(front) 2.1MP
+Android 11Advantage Android 11 is newer and safer	vs	Android 4.2.2 Jelly Bean
+(4G LTE-A) 300 Mbps2 times Faster for surfing the internet and download files	vs	(4G LTE) 100 Mbps
+Face unlock 2DAdvantage Sensors help you use the device	vs	Not supported
+Fingerprint sensor (rear-mounted)Advantage Sensors help you use the device	vs	Not supported
+5020 mAh52% Battery - higher amperage (mAh) allows more device usage time, but it also depends on the hardware and use	vs	3300 mAh
+2 slots (Dual-SIM) (dedicated slot)Advantage You can have more mobile carriers/operators on the same device.	vs	1 slot (Single-SIM) (dedicated slot)
+Active noise cancellationAdvantage More noise-canceling microphones allow for better quality in calls and audio for recorded videos	vs	Not supported
+5.0 + A2DP/LEAdvantage Bluetooth 5.0 + A2DP/LE is newer and faster	vs	4.0 + A2DP
+Type-CAdvantage Reversible connector, you can stick in a USB-C cable any which way; either side is up.	vs	MicroUSB 2.0
+Water repellent nano-coating (don't immerse)Advantage Protection against water allows you talk to your friends in the rain, for example	vs	Not supported
LED flash	vs	+Quad-LED flashAdvantage The Quad-LED flash helps in dark places or in low light
Full HD (1920x1080)	vs	+4K UHD (3840x2160)3 times More image quality for recording videos with the primary camera
Not supported	vs	+DLNAAdvantage With DLNA technology you can access and play media files on TV, tablet or DLNA compatible device.
Not supported	vs	+NFCAdvantage NFC allows you to make payments by approach quickly and securely

26 Common items in both devices

TFT IPS LCD

16 million

Only digital zoom

PDAF: phase detection autofocus / Autofocus

EIS: Digital stabilization

BSI sensor

(front) Full HD (1920x1080)

+19 specs and more in the table below

Check the comparison table below for more items that are not evaluated in comparison score above.

Highlight differences

📱 Model features
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Change model
Model	Redmi Note 9 (128GB/6GB)	Liquid S2 (S520)
Other model names	Mi Redmi Note 9 M2003J15SC, M2003J15SS	Acer Liquid S520, Acer S520, Acer Hamingway
Country or region available	China, India	(Global, International)
Brand	Xiaomi	Acer
Release date	5/12/2020, Announced: 4/30/2020	12/1/2013
Depth	8.9 millimeters (0.35 inches)	9 millimeters (0.35 inches)
Size (width x height)	77.2 x 162.3 millimeters (3.04 x 6.39 in)	86 x 166 millimeters (3.39 x 6.54 in)
Weight	199 grams (6.97 ounces)	231 grams (8.09 ounces)
Build, materials	Plastic body, glass front	feature not registered
Protection against water and others	Water repellent nano-coating (don't immerse)	Not supported
📲 Display
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Display type	TFT IPS LCD	TFT IPS LCD
Screen size	6.53" inches	6" inches
Screen-to-body ratio	~83.5% (screen-to-body ratio)	~69.5% (screen-to-body ratio)
Display resolution	1080x2340 pixels (19.5:9)	1080x1920 pixels
Touchscreen	Capacitive Multitouch	Capacitive Multitouch
Pixel density (dot pitch)	395 PPI	367 PPI
Colors	16 million	16 million
Scratch-resistant glass	Gorilla Glass 5	Gorilla Glass 3
Refresh rate	60Hz	feature not registered
Display features	450nits[typ]	feature not registered
🤖 Operating System
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
System version	Android 10	Android 4.2.2 Jelly Bean
Firmware update	Android 11	feature not registered
User Interface	MIUI 11 / 12	feature not registered
⚙️ Processor
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Chipset	64bit: MediaTek Helio G85 (12nm)	32bit: Qualcomm Snapdragon 800 MSM8974 (28nm)
CPU	Octa-core, 2 processors: 2x 2GHz ARM-Cortex-A75 (Dual-core) 6x 1.8GHz ARM-Cortex-A55 (Hexa-core)	Quad-core, 1 processor: 4x 2.2GHz Krait 400 (Quad-core)
GPU graphical controller	ARM Mali-G52 MC2 (1GHz)	Qualcomm Adreno 330
Performance (benchmark)	AnTuTu: 200451 (v8) Geekbench: 1292 (v5.1)	feature not registered
💽 Memory and storage
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
RAM memory	6GB LPDDR4X	2GB LPDDR3
Internal storage	128GB (106GB available) eMMC 5.1	16GB (12GB available)
External storage	Until 512GB microSD, microSDXC (dedicated slot)	Until 64GB microSD, microSDXC (dedicated slot)
📶 Mobile networks
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Dual-SIM	Dual-SIM Standby - Call active on one sim card (dedicated slot)	Not supported
SIM card	2 slots (Dual-SIM) nano-SIM (4FF)	1 slot (Single-SIM) micro-SIM (3FF)
Maximum Download / Upload	300/150 Mbps	100/50 Mbps
Network technology	2G, 3G, 4G	2G, 3G, 4G
Frequency, bands	Expand band details Collapse details
GSM MHz band	Quad-Band 850/900/1800/1900	Quad-Band 850/900/1800/1900
Primary 2G network	GSM 850/900/1800/1900	GSM 850/900/1800/1900
Primary 3G network	UMTS 850/900/1700/1900/2100	UMTS 900/2100
Primary 4G network	LTE Cat7 (1, 2, 3, 4, 5, 7, 8, 20, 28) TD-LTE (38, 40, 41) VoLTE	LTE Cat3 800/1800/2600 (Bands 3,7,20)
Primary 5G network	Not supported	Not supported
Primary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, LTE
Secondary 2G network	GSM 850/900/1800/1900	Not supported
Secondary 3G network	UMTS 850/900/1700/1900/2100	Not supported
Secondary 4G network	LTE Cat7 (1, 2, 3, 4, 5, 7, 8, 20, 28) TD-LTE (38, 40, 41) VoLTE	Not supported
Secondary data network	GPRS, EDGE, UMTS, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A	Not supported
📷 Camera
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Back camera (main camera)	(quad camera) 48 megapixels 8MP ultrawide f/2.213mm1/4"1.12µm118° 2MP macro f/2.41.75µmAF 2MP depth f/2.41/5"1.7µm	13 megapixels
Main camera resolution	8000x6000 pixels	4160x3120 pixels
Video recording (primary)	Full HD (1920x1080) 30 fps	4K UHD (3840x2160) 30 fps
Flash	LED flash	Quad-LED flash
Focal aperture	f/1.8 (aperture)	feature not registered
Focal length	26mm (lens)	feature not registered
Sensor size	1/2" inches	feature not registered
Pixel size	0.8µm pixel	feature not registered
Autofocus	PDAF: phase detection autofocus	Autofocus
Touch focus	Supported	Supported
Image stabilization	EIS: Digital stabilization	EIS: Digital stabilization
Zoom	Only digital zoom	Only digital zoom
Face/smile detection	Face detection, Smile detection	Face detection, Smile detection
BSI sensor	Supported	Supported
HDR	HDR photo on both cameras	HDR photo only main camera
Camera extras	feature not registered	feature not registered
📸 Front camera
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Front camera (secondary)	13 megapixels	2.1 megapixels
Front camera resolution	4128x3096 pixels	1920x1080 pixels
Video recording (secondary)	Full HD (1920x1080)	Full HD (1920x1080)
Front flash	Not supported	Not supported
Focal aperture	f/2.3 (aperture)	feature not registered
Focal length	29mm (lens)	feature not registered
Sensor size	1/3.06" inches	feature not registered
Pixel size	1.12µm pixel	feature not registered
🔉 Sound and multimedia
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Loudspeaker	Mono sound (not stereo)	Supported
Active noise cancellation	2 microphones or more	Not supported
Radio	FM	FM (RDS)
TV	Not supported	Not supported
Video formats	MP4, H.265, H.264, H.263, XviD, MKV	MP4, H.264, H.263
Audio formats	MP3, WAV, WMA, eAAC+, FLAC	MP3, WAV, eAAC+
🔌 Connectivity
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
USB	USB 2.0 Type-C, USB OTG On-The-Go	MicroUSB 2.0
Audio output	3.5mm jack	3.5mm jack
TV output	USB Type-C (reversible)	Not supported
Bluetooth	5.0 + A2DP/LE	4.0 + A2DP
WiFi	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot	802.11 a/b/g/n/ac [wifi5] (2.4GHz, 5GHz) + MIMO WiFi Direct, hotspot
DLNA	Not supported	Supported
GPS	A-GPS, GeoTagging, GLONASS, GALILEO, BeiDou	A-GPS, GeoTagging, GLONASS
NFC	Not supported	Supported
Infrared port	Supported	Not supported
🧭 Sensors
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Sensors	Accelerometer Ambient light sensor Compass Face unlock 2D Fingerprint sensor (rear-mounted) Gyroscope Proximity sensor	Accelerometer Ambient light sensor Compass Gyroscope Proximity sensor
Vibrating alert	Supported	Supported
🔋 Battery
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Battery type	LiPo: li-ion polymer (Non removable)	LiPo: li-ion polymer (Non removable)
Battery capacity	5020 mAh	3300 mAh
Charger, watts	18W Wired fast charging 9W Reverse charging by cable	Wired charging
Inductive / wireless charging	Not supported	feature not registered
Talk time autonomy	33 hours (1.4 days)	feature not registered
Standby	feature not registered	feature not registered
➕ Other features
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
Call control	Voice dialing, Voice recorder, Voice commands	Voice dialing, Voice recorder
Messaging	SMS (T9), MMS, E-mail, Push mail	SMS (T9), MMS, E-mail, Push mail
Hands-free calling	Supported	Supported
Video calling	Supported	Supported
Ringtones	Polyphonic and customized	Polyphonic and customized
Web browser	HTML, XHTML, HTML5	HTML, XHTML, HTML5
Antenna	Internal antenna	Internal antenna
Qwerty physical keyboard	Not supported	Not supported
Miscellaneous	• Colors: Forest Green, Midnight Grey, Polar White • 22.5W charger (18W phone support)	• Colors: Black, Red • Acer Float UI • DTS sound enhancement
☢️ Radiation rate
	Redmi Note 9 (128GB/6GB)	Acer Liquid S2 (S520)
SAR 1.6W/kg (USA, Mexico, etc.)	0.84W/kg (head), 0.9W/kg (body)	feature not registered
SAR 2W/kg (Europe, UK, etc.)	0.8W/kg (head), 1.14W/kg (body)	feature not registered