Network Scope 2G, 3G, 4G
Battery Type & Performance Lithium-ion 3080 mAh (non-removable)
Body & Weight 155.4 x 75.8 x 7.3 millimeter (metal body), 165 grams
Camera Factors (Back) Phase detection autofocus, 26mm+50mm, f/2.2+f/2.6, 2x optical zoom, dual-LED flash, HDR, panorama mode, auto face recognition, 1.25 µm+1.0 µm pixel size
Camera Resolution (Back) Dual 12 Megapixel
Camera Resolution (Front) 5 Megapixel (Full HD video rec.)
Chipset Qualcomm Snapdragon 625
Colors Available Black, Gold, Rose Gold
Display Size & Resolution 5.5 inches, Full HD 1920 x 1080 pixels (403 ppi)
Display Type LTPS IPS LCD Touchscreen with Corning Gorilla Glass 3 protection
Graphics Processing Unite (GPU) Adreno 506
Memory Card Slot MicroSD, up to 128 GB (uses SIM 2 slot)
Operating System Android 7.1.2 (Nougat), planned upgrade to Android 8.0 (Oreo)
Processor Octa-core, 2.0 GHz
RAM 3/4 GB
ROM 32/64 GB
Release Date September 2017
Sensors Accelerometer, gyro, proximity, compass, fingerprint
SIM Card Type Hybrid Dual SIM (Nano-SIM, dual stand-by)
USB MicroUSB v2.0, Type-C 1.0 reversible connector
Video Recording Ultra HD 4K (2160p)
Wireless LAN Yes, dual band, Wi-Fi Direct, hotspot
Special Features - Fingerprint Sensor, Fast Battery Charging, full metal body
Other Features - Bluetooth, GPS, A-GPS, MP3, MP4, Radio, GPRS, Edge, Loudspeaker, Multitouch
####Xiaomi Redmi Note 4 was released in January and in September 2017, Xiaomi brought another impressive device Xiaomi Mi A1. Mi A1 is priced little higher than the Redmi Note 4. Mi A1 has a much better primary camera and 4K video facility. The display has gorilla glass protection. These are the three significant improvements. Another big plus is that you can upgrade this device to the next version of Android (Oreo 8.0). But on the other hand, it has no OTG, and the battery performance is lower than Note 4. The design of Note 4 was presented more elegantly than Mi A1 as well. But despite all the discussed facts, this phone is still one of the best deals in current Bangladeshi market for the price. Consider the 5.5 inches full HD display, 4 GB RAM, 64 GB ROM, 2.0 GHz Octa-core CPU, fingerprint sensor, full metal body and 12 MP primary camera. All these features make Xiaomi Mi A1 a unique and quality device in this price range.