Mi A1 comes with a 5.5" touchscreen display with Full HD 1080p resolution, powered by a 3080 mAh battery. It measures 155.40 × 75.80 × 7.30 and weighs 165.00 grams. The phone is powered by a 2.0 GHz Octa-core Qualcomm Snapdragon 625 processor with 14 nm FinFET with Adreno 506 650 MHz GPU, and comes with 4GB of RAM. It has an internal storage of 32/64GB, and unique for the series, microSD card slot supporting up to 128GB cards. The rear camera on the Mi A1 is 12MP 1.25μm f/2.2 + 12MP 1.0 μm, 2.6 shooter with auto focus and 2× optical lossless zoom, Two tone Flash and 5- Piece lens, it is capable of recording HD videos, the phone also has a 5MP 1.12μm, 2 front camera. Sensors on the phone include compass magnetometer, proximity sensor, accelerometer, ambient light sensor, gyroscope, fingerprint sensor, Infrared and Hall Sensor
Software
The Xiaomi Mi A1 ships with Android 7.1.2 Nougat and Update to Android 9.0 Pie is available. Besides Google software, the phone comes with Xiaomi's applications such as Camera, FeedBack, Mi Community and Mi Remote. The Mi A1 will receive OS upgrades for a minimum of two years. The Android Oreo update does not bring a project Treble functionality for device independent system updates. The device's kernel sources were released in January 2018, 4 months after its release.
Release
The Xiaomi Mi A1 was unveiled on September 5, 2017 and it is available in all of Xiaomi's current markets, with the exception of the People's Republic of China, where Mi 5X MIUI based variant of the phone was released prior that year.
Reception
Xiaomi Mi A1 received mostly positive reviews. Sam Byford of The Verge described Mi A1's most distinct feature is its software that runs on stock Android and not on Xiaomi's MIUI layer. Sahil Gupta of TechRadar wrote that Mi A1's Android One certified experience along with tried and tested hardware, and dual camera capability gives you the premium feel under a budget. The phone has been described as 'giving a resurgence' to the Android One program, being the first Android One phone to be sold worldwide, and the first Android One phone by a top-5 bestselling smartphone brand. It was also the first mid-range priced phone to feature a dual rear camera setup with a zoom lens.
Issues
The Android Oreo update rolled out at the end of 2017 produces a drastic battery drain on some devices. Xiaomi is already aware of this issue and claims to be working on a fix, but it never arrived. Another glaring issue is Wi-Fi, dropping connections constantly - another one from long list of ignored problems. Update to Android Pie introduced many issues never fixed, and Mi A1 will probably never receive Android 10 - not fulfilling promised 2 years of software updates.
