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Brand | samsung | oppo | xiaomi |
Model | samsung galaxy m21 2021 | oppo pad 2 | xiaomi redmi k20 pro |
Announced | 2021 July 21 | 2023 March 21 | 2019 May 28 |
Status | Available. Released 2021 July 26 | Available. Released 2023 March 24 | Available. Released 2019 June 01 |
Device Body | glass front | plastic back | plastic frame | glass front | aluminum frame | glass front ( gorilla glass 5 ) | glass back ( gorilla glass 5 ) | aluminum frame |
Dimensions | 159 x 75.1 x 9 mm ( 6.26 x 2.96 x 0.35 in ) | 258 x 189.4 x 6.5 mm ( 10.16 x 7.46 x 0.26 in ) | 156.7 x 74.3 x 8.8 mm ( 6.17 x 2.93 x 0.35 in ) |
Weight in gram | 192 | 552 | 191 |
SIM card | dual SIM ( Nano-SIM | dual stand-by ) | No | dual SIM ( Nano-SIM | dual stand-by ) |
Water Resistance | No | No | No |
Display type | Super AMOLED | 420 Luminance units ( the peak ) | IPS LCD | 1b colors | dolby vision | 144hz | 500 Luminance units ( typ ) | Super AMOLED | HDR10 |
Display resolution | 1080 x 2340 pixels | 19.5 : 9 ratio ( ~403 pixel per inch density ) | 2000 x 2800 pixels ( ~296 pixel per inch density ) | 1080 x 2340 pixels | 19.5 : 9 ratio ( ~403 pixel per inch density ) |
Display size | 6.4 inches | 100.5 cm2 ( ~84.2% screen to body ratio ) | 11.61 inches | 411.3 cm2 ( ~84.2% screen to body ratio ) | 6.39 inches | 100.2 cm2 ( ~86.1% screen to body ratio ) |
Display Protection | corning gorilla glass 5 | ||
Operating System | android 11 | one ui 3.1 core | android 13 | coloros 13.1 | android 9.0 ( pie ) | upgradable to android 10 | miui 12 |
CPU | Octa-core ( 4x2.3 GHz cortex-a73 & 4x1.7 GHz cortex-a53 ) | Octa-core ( 1x3.05 GHz cortex-x2 & 3x2.85 GHz cortex-a710 & 4x1.80 GHz cortex-a510 ) | Octa-core ( 1x2.84 GHz kryo 485 & 3x2.42 GHz kryo 485 & 4x1.78 GHz kryo 485 ) |
Chipset | exynos 9611 ( 10nm ) | mediatek dimensity 9000 ( 4 nm ) | Qualcomm sm8150 snapdragon 855 ( 7 nm ) |
GPU | mali-g72 mp3 | mali-g710 mc10 | adreno 640 |
Memory card | microsdxc ( dedicated slot ) | No | No |
Memory v1 | 64gb 4gb RAM | 256gb 8gb RAM | 64gb 6gb RAM |
Memory v2 | 128gb 6gb RAM | 256gb 12gb RAM | 512gb 12gb RAM | 128gb 6gb RAM | 128gb 8gb RAM | 256gb 8gb RAM |
Primary camera | 48 megapixel| lens aperture2.0 | 26mm ( wide ) | 1/2.0" | 0.8µm | phase detection autofocus 8 megapixel| lens aperture2.2 | 123˚ ( ultrawide ) | 1/4.0" | 1.12µm 5 megapixel| lens aperture2.2 | ( depth ) | 13 megapixel| lens aperture2.2 | ( wide ) | Auto focus | 48 megapixel| lens aperture1.8 | 26mm ( wide ) | 1/2.0" | 0.8µm | phase detection autofocus | Laser Auto focus 8 megapixel| lens aperture2.4 | 53mm ( telephoto ) | 1/4.0" | 1.12µm | phase detection autofocus | 2x optical zoom 13 megapixel| lens aperture2.4 | 12mm ( ultrawide ) | 1/3.1" | 1.12µm |
Secondary camera | 20 megapixel| lens aperture2.2 | 26mm ( wide ) | 8 megapixel| lens aperture2.3 | 103˚ ( ultrawide ) | Motorized pop-up 20 megapixel| lens aperture2.2 | ( wide ) | 1/3.4" | 0.8µm |
Loud speaker | Yes | Yes with stereo speakers ( 4 speakers ) | Yes |
Audio jack | Yes | No | Yes |
WLAN | Wi-Fi 802.11 a/b/g/n/ac | dual-band | Wi-Fi Direct | Wi-Fi 802.11 a/b/g/n/ac/6 | dual-band | Wi-Fi 802.11 a/b/g/n/ac | dual-band | Wi-Fi Direct | hotspot |
Bluetooth | 5.0 | a2dp | le | 5.3 | a2dp | le | aptx hd | 5.0 | a2dp | le | aptx hd |
GPS | Yes with dual-band a-gps glonass bds galileo | ||
NFC | Yes ( market/region dependent ) | No | Yes ( china only ) |
Radio | FM Radio | rds | recording | No | Yes |
USB | USB Type-C 2.0 | USB Type-C 2.0 | otg | accessory connector | USB Type-C 2.0 | USB on-the-go |
Sensors | fingerprint ( rear-mounted ) | accelerometer | gyroscope | proximity | compass | accelerometer | gyroscope | compass | color spectrum | fingerprint ( under display | optical ) | accelerometer | gyroscope | proximity | compass |
Battery | li-po 6000 mAh | Non-removable | li-po 9510 mAh | Non-removable | li-po 4000 mAh | Non-removable |
Battery Charge | 15w wired | 67w wired | pd | qc 2.0.0 | Fast charging 27w | quick charge 4+ |
Colors | black color gradations, blue color gradations | gray, gold | black color gradations, red color gradations, blue color gradations, summer honey, white color gradations |
Network technology | gsm / hspa / lte | No cellular connectivity | gsm / hspa / lte |
5G bands | |||
Network speed | hspa lte-a | hspa 42.2/5.76 mbps lte-a | |
GPRS | No | ||
EDGE | No | ||
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