Manufacturer and Model

Manufacturer
Acer
Xiaomi
Phone model
Allegro
Redmi 9 64Gb
Year of release
2011
2020

Appearance

Case type
Monoblock
Monoblock
Body length
116 mm
163 mm
Body width
59 mm
77 mm
Body thickness
12 mm
9.1 mm
Weight
130 g
198 g
Volume
81.99 cm³
114.42 cm³
Body materials and finishes
  • Plastic
  • Plastic
Colors

Processor (CPU)

Processor model
  • Qualcomm 8255
  • MediaTek Helio G80
CPU clock speed
1000 MHz
2000 MHz
Number of processor cores
1
8
Level 1 cache (L1)
32 + 32 kB
Level 2 cache (L2)
384 kB
Processor size
32 bits
Instruction set architecture
ARMv7
Manufacturing process
45 nm

Graphics Processor (GPU)

GPU
GPU model
  • AMD Adreno 205
  • Mali-G52 2EEMC2

Primary storage (RAM)

The amount of RAM
512 MB
4 GB
RAM type
LPDDR2
RAM frequency
500 MHz
Number of RAM channels
2

Internal storage

Built-in memory
  • 8 GB
  • 64 GB

SD card

Types of Supported Memory Cards
  • microSDHC
  • microSD
  • microSDXC
  • microSDHC
  • microSD
Maximum expandable memory
32 GB
Hot swappable memory card

Mainboard

Chipset
  • Qualcomm Snapdragon S2 MSM8255

Operating system

Operating system
Windows Phone 7.5
Android 10.0

Battery

Battery capacity
1300
5020
Battery type
Li-Ion
Li-Ion
Removable battery
Charging the battery from USB
Call duration in GSM networks
6 h
31 h
Standby time in GSM networks
400 h
185 h
Call duration in UMTS (WCDMA) networks
6 h
31 h
Standby time on UMTS (WCDMA) networks
185 h

Screen

Screen diagonal
3.6 in
6.53 in
Screen resolution
800 x 480 pixels
2340 x 1080 pixels
Resolution formats
  • Full HD
  • HD
Pixel density
259 ppi
395 ppi
Screen technology
TFT
S-IPS
Color depth
18 bit
24 bit
Touch screen
Touch screen type
Capacitive
Capacitive
Anti-scratch screen
Aspect ratio
1.667
2.167
Auto-rotate screen
Ambient light sensor
Proximity sensor

Main photo/video camera

Camera megapixels
5 Mp
13 Mp
Maximum photo resolution
2592 x 1944 pixels
4807 x 2704 pixels
Shooting resolution formats
  • Quad HD
  • Full HD
  • HD
  • Ultra HD
  • Quad HD
  • Full HD
  • HD
Dual camera
The presence of a flash
Flash type
LED
LED
Shooting settings
Autofocus
Auto exposure
Face detector
Viewfinder
Digital image stabilization
Other photo settings
  • Serial shooting
  • Panoramic shooting
  • Hdr shooting
  • Face detection
Video capability
Maximum video resolution
1280 x 720 pixels
1920 x 1080 pixels
Movie speed
30 fps
30 fps
Movie settings
Movie settings list
  • White balance
  • Color effects
  • Scene selection mode

Front photo/video camera

Front camera megapixels
8 Mp
Maximum photo resolution
3771 x 2121 pixels
Shooting resolution formats
  • Quad HD
  • Full HD
  • HD
Front camera video

SIM card and calls

Number of SIM-cards
1
2
Mode of operation of multiple SIM-cards
Alternating
SIM card type
Nano-SIM
MP3 ringtones
Polyphonic ringtones
Vibration mode
Speakerphone
Conference call
Speed dial
Video calls
Second microphone
Autodial
Noise reduction during a call
Sound indication of talk time
Ability to mute the microphone during a call
Extended phone book
Contacts in the phone book
Unlimited
Data exchange between SIM card and internal memory

Mobile communications

Cellular generation
3.5G
4.5G
GSM support
GSM frequencies
  • GSM 850 MHz
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 1900 MHz
  • GSM 850 MHz
  • GSM 900 MHz
  • GSM 1800 MHz
  • GSM 1900 MHz
UMTS support
UMTS frequencies
  • UMTS 850 MHz
  • UMTS 900 MHz
  • UMTS 1900 MHz
  • UMTS 2100 MHz
  • UMTS 850 MHz
  • UMTS 900 MHz
  • UMTS 1700 MHz
  • UMTS 1900 MHz
  • UMTS 2100 MHz
LTE support

Internet data transmission standards

Data transmission standards
  • HSDPA
  • EDGE
  • GPRS
  • HSPA+
  • HSUPA
  • HSDPA
  • EDGE
  • GPRS

Wi-Fi

Built-in Wi-Fi
Wi-Fi standards
  • 802.11b
  • 802.11g
  • 802.11n
Wi-Fi Direct support

USB

USB connector
USB connector type
Micro USB
USB Type-C
USB standard
2.0
2.0
USB OTG support
USB Mass Storage support

Bluetooth

Built-in Bluetooth
Bluetooth standard
2.1 + EDR
5.0
A2DP support
AVRCP support

Navigation and positioning

Built-in GPS
A-GPS support
Installed GLONASS
Built-in digital compass

Radio

Built-in radio receiver
Radio range
87.5 - 108.0
87.5 - 108 МГц
RDS support
DRM support
Radio recording

Sensors and gauges

Ambient light sensor
Proximity sensor
Accelerometer
Orientation and rotation sensor
Magnetometer

Connectors and interfaces

USB connector
Micro USB
USB Type-C
TRS jack (mini/micro jack)
3.5 mm
3.5 mm
Wireless NFC

Images

Supported image formats
  • PNG
  • JPEG
  • GIF
  • BMP
Installed image editor
Geo tags
DLNA support

Video

Installed video player
Supported video formats
  • MPEG-4
  • H.263
  • H.264
  • WMV
  • MP4
  • AVI
  • 3GPP
  • WMV
Video resolution formats
  • HD
  • Full HD
  • HD
Streaming video
Geo tags

Audio

Installed audio player
Supported audio formats
  • AAC
  • eAAC+
  • MP3
  • WMA
  • WAV
  • AAC
  • MIDI
  • MP3
  • WMA
  • WAV
MP3 support
Streaming audio
Number of polyphony voices
64
Dictaphone
Voice notes
TRS jack (mini/micro jack)
3.5 mm
3.5 mm

Control elements

Touch input
Multitouch
Pinch zoom
Russified input

Documents and office

Installed Organizer (PIM)
Office document support
Supported document formats
  • PDF
Email
IMAP4 protocol support
Convert speech to text

Connectivity and synchronization

PC connection
Synchronization over the mobile network
OTA sync
Synchronization with services
  • Gmail
  • Gtalk
  • Facebook
  • Twitter
  • Youtube
  • Google search
  • Google maps

Software features

Installed browser
  • HTML
  • HTML5
  • WAP
  • HTML
  • WAP

Receiving and sending SMS

SMS messages
SMS T9 support
SMS output in the form of a chat
MMS support

Security

Installed VPN

Additional features

Standalone mode (flight mode)

SAR level

SAR level
0.55 W/kg