The drivers to connect/unlock the Xiaomi Redmi K40 smart phone to backup,tether, network and more are below. Be aware if you are looking to unlock the bootloader or other advanced software functions it most likely will void any existing warranty. Also Functions used at the fastboot screen can wipe the phones data, be sure to have a full backup before conducting any technical procedures. Look at the specs on this page, if your device uses Mediatek chipset use MTK Drivers, if your device has a Qualcomm chipset then use Qualcomm drivers.
SIM: Dual SIM (Nano-SIM, dual stand-by)
Display: Type: Super AMOLED, 120Hz, HDR10+, 1300 nits (peak)
Size: 6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)
Resolution: 1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Protection: Corning Gorilla Glass 5
Platform: OS: Android 11, MIUI 12
Step 1 — Download and extract the Android USB Driver to your PC.
Step 2 — Click Start (Windows) -> Control Panel -> Device Manager (Select Device Manager).
Step 3 — On the Device Manager window find and click on computer name to select Add legacy hardware.
Step 4 — Select Next
Step 5 — Selext Install the hardware that I manually select from a list (Advanced), and click the Next
Step 6 — Select Show All Devices afterward click Next button again.
Step 7 — Click the Have Disk button.
Step 8 — Click Browse button to find the extracted Android ADB Driver -> android_winusb.inf and click on Open.
Step 9 — Click OK.
Step 10 — Now select the Android ADB Interface -> click Next button.
Step 11 — Click Next button again.
Step 12 — Windows Security box will appear, to confirm whether you really want to install the Android USB Driver, so just choose the Install this driver software anyway.
Step 13 — Once you clicked the Finish button, then repeat from step 2 to choose Android Composite ADB Interface.
Step 14 - Done.
Show: Full Specs/Additional configurations
Body: Dimensions: 163.7 x 76.4 x 7.8 mm (6.44 x 3.01 x 0.31 in)
Weight: 196 g (6.91 oz)
SIM: Dual SIM (Nano-SIM, dual stand-by)
Display: Type: Super AMOLED, 120Hz, HDR10+, 1300 nits (peak)
Size: 6.67 inches, 107.4 cm2 (~85.9% screen-to-body ratio)
Resolution: 1080 x 2400 pixels, 20:9 ratio (~395 ppi density)
Protection: Corning Gorilla Glass 5
Platform: OS: Android 11, MIUI 12
Chipset: Qualcomm SM8250-AC Snapdragon 870 5G (7 nm)
CPU: Octa-core (1x3.2 GHz Kryo 585 & 3x2.42 GHz Kryo 585 & 4x1.80 GHz Kryo 585)
GPU: Adreno 650
Memory: Card slot: No
Internal: 128GB 6GB RAM, 128GB 8GB RAM, 256GB 8GB RAM, 256GB 12GB RAM
: UFS 3.1
Main Camera: Triple: 48 MP, f/1.8, 26mm (wide), 1/2", 0.8µm, PDAF
8 MP, f/2.2, 119˚ (ultrawide)
5 MP, f/2.4, 50mm (macro), 1/5.0", 1.12µm
Features: LED flash, HDR, panorama
Video: 4K@30fps, 1080p@30/60/120/240/960fps, gyro-EIS
Selfie camera: Single: 20 MP, f/2.5, (wide), 1/3.4", 0.8µm
Features: HDR
Video: 1080p@30fps, 720p@120fps
Sound: Loudspeaker: Yes, with stereo speakers
3.5mm jack: No
: 24-bit/192kHz audio
Comms: WLAN: Wi-Fi 802.11 a/b/g/n/ac/6, dual-band, Wi-Fi Direct, hotspot
Bluetooth: 5.1, A2DP, LE
GPS: Yes, with dual-band A-GPS, GLONASS, BDS, GALILEO, QZSS, NavIC
NFC: Yes
Infrared port: Yes
Radio: No
USB: USB Type-C 2.0, USB On-The-Go
Features: Sensors: Fingerprint (side-mounted), accelerometer, gyro, proximity, compass, color spectrum
Battery: Type: Li-Po 4520 mAh, non-removable
Charging: Fast charging 33W, 100% in 52 min (advertised)
Power Delivery 3.0
Quick Charge 3+
