| Physical features | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Model | Redmi 9A (64GB) | Galaxy S2 Plus (GT-i9105) |
| Other model names | Xiaomi Redmi 9A M2006C3LG, M2006C3LI | Samsung Galaxy S ii Plus i9105, Samsung GT-i9105 |
| Country or region available | 
China | feature not registered |
| Brand | Xiaomi | Samsung |
| Release date | June, 2020 | February, 2013 |
| Depth | 9 millimeters (0.35 inches) | 8.5 millimeters (0.33 inches) |
| Size (width x height) | 77.07 x 164.9 millimeters (3.03 x 6.49 in) | 66.1 x 125.3 millimeters (2.6 x 4.93 in) |
| Weight | 194 grams (6.79 ounces) | 121 grams (4.24 ounces) |
| Qwerty physical keyboard | Not supported | Not supported |
| Antenna | Internal antenna | Internal antenna |
| Build, materials | Plastic body, glass front | feature not registered |
| Protection against water and others | Not supported | Not supported |
| System (OS) | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Operating system | Android 10 | Android 4.1.2 Jelly Bean |
| Firmware update | feature not registered | Android 4.2.2 Jelly Bean |
| Hardware | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Chipset | 64bit - MediaTek Helio G25 (12nm) | 32bit - Broadcom BCM28155 (40nm) |
| CPU processor | Octa-Core, 2 processors:
2Ghz Quad-Core ARM Cortex-A53
1.5Ghz Quad-Core ARM Cortex-A53 | 1.2Ghz Dual-Core ARM Cortex-A9 |
| GPU graphical controller | PowerVR GE8320 650Mhz | Broadcom VideoCore IV |
| RAM memory | 4GB LPDDR4X | 1GB LPDDR2 |
| Internal storage | 64GB (49GB available)
eMMC 5.1 | 8GB (5GB available) |
| External storage | Until 512GB microSD, microSDXC
(dedicated slot) | Until 64GB microSD, microSDXC
(dedicated slot) |
| Display | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Display type | TFT IPS LCD | Super AMOLED Plus |
| Screen size | 6.53" inches | 4.3" inches |
| Screen-to-body ratio | ~81% (screen-to-body ratio) | ~63.5% (screen-to-body ratio) |
| Display resolution | 720x1600 pixels (20:9) | 480x800 pixels |
| Touchscreen | Capacitive Multitouch | Capacitive Multitouch |
| Pixel density (dot pitch) | 269 PPI | 217 PPI |
| Colors | 16 million | 16 million |
| Scratch-resistant glass | Not supported | Not supported |
| Display features | 60Hz, 400 nits | feature not registered |
| Mobile networks | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| 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)
Standard mini-SIM (2FF) |
| Maximum download/upload | 300/50 Mbps | 21/5.76 Mbps |
| Network technology | 2G, 3G, 4G | 2G, 3G |
| Frequency, bands | Expand band detailsCollapse 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 850/900/1900/2100 |
| Primary 4G network | LTE Cat6 (1, 2 ,3, 4, 5, 7, 8, 20, 28)
TD-LTE (38, 40, 41)
VoLTE | Not supported |
| 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+ |
| Secondary 2G network | GSM 850/900/1800/1900 | Not supported |
| Secondary 3G network | Not supported | Not supported |
| Secondary 4G network | Not supported | Not supported |
| Secondary data network | GPRS, EDGE | Not supported |
| Calling | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Messaging | SMS (T9), MMS, E-mail, Push mail | SMS (Swype), MMS, E-mail, Push mail |
| Speakerphone | Supported | Supported |
| Video calling | Supported | Supported |
| Call control | Voice dialing, Voice recorder, Voice commands | Voice dialing, Voice recorder, Voice commands |
| Camera | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Back camera (main camera) | 13 megapixels | 8 megapixels |
| Main camera resolution | 4128x3096 pixels | 3264x2448 pixels |
| Video recording (primary) | Full HD (1920x1080) 30 fps | Full HD (1920x1080) 30 fps |
| Flash | LED flash | LED flash |
| Focal aperture | f/2.2 (aperture) | f/2.6 (aperture) |
| Focal length | 28mm lens | feature not registered |
| Sensor size | feature not registered | 1/3.2" inches |
| Pixel size | 1µm 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 | Not supported | Not supported |
| HDR | HDR photo on both cameras | Not supported |
| 2ª camera | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Front camera (secondary) | 5 megapixels | 2 megapixels |
| Front camera resolution | 2560x1920 pixels | 1600x1200 pixels |
| Video recording (secondary) | Full HD (1920x1080) | Not supported |
| Front flash | Not supported | Not supported |
| Focal aperture | f/2.2 (aperture) | feature not registered |
| Focal length | feature not registered | feature not registered |
| Sensor size | feature not registered | feature not registered |
| Pixel size | 1.12µm pixel | feature not registered |
| Multimedia | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| 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, DivX, XviD, WMV |
| Audio formats | MP3, WAV, WMA, eAAC+, FLAC | MP3, WAV, eAAC+, AC3, FLAC |
| Connectivity | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| USB | MicroUSB 2.0, USB OTG On-The-Go | MicroUSB 2.0 |
| TV output | Micro-B USB SlimPort | Micro-B USB MHL |
| Audio output | 3.5mm jack | 3.5mm jack |
| Bluetooth | 5.0 + A2DP/LE | 3.0 + A2DP |
| WiFi | 802.11 b/g/n (2.4Ghz) | 802.11 a/b/g/n (2.4Ghz, 5Ghz) + MIMO |
| DLNA | Not supported | Supported |
| NFC | Not supported | Not supported |
| GPS | A-GPS, GeoTagging, GLONASS, BeiDou | A-GPS, GeoTagging, GLONASS |
| Infrared port | Not supported | Not supported |
| Other functions | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Active noise cancellation | Supported | Supported |
| Vibrating alert | Supported | Supported |
| Ringtones | Polyphonic and customized | Polyphonic and customized |
| Web browser | HTML, XHTML, HTML5 | HTML, XHTML, HTML5 |
| Sensors | Accelerometer
Proximity sensor
Ambient Light sensor
Face unlock
| Accelerometer
Proximity sensor
Compass
Ambient Light sensor
Gyroscope
|
| Other features | - Colors: Carbon Gray, Sky Blue, Ocean Green
- MIUI 12
- WiFi direct, hotspot | - Colors: Chic White, Dark Blue
- Samsung TouchWiz UI 5.0
- WiFi direct, hotspot |
| Power supply | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| Battery | LiPo: Li-Ion polymer (Non removable) | Li-Ion: Lithium-Ion (Removable) |
| Battery capacity | 5000 mAh | 1650 mAh |
| Charger, watts | 10W (5V/2A) Standard charging | Standard charging |
| Talk time autonomy | feature not registered | feature not registered |
| Standby | feature not registered | feature not registered |
| Radiation rate | Xiaomi Redmi 9A (64GB) | Samsung Galaxy S2 Plus (GT-i9105) |
| SAR 1.6W/kg (USA, Mexico, etc.) | 0.9W/kg (head) | 0.65W/kg (body) | feature not registered |
| SAR 2W/kg (Europe, UK, etc.) | 0.4W/kg (head) | 1.19W/kg (body) | feature not registered |