UMIDIGI has released details on its upcoming new smartphone, the F1, on its official website. This device will come with Android Pie out of the box, as well as SD card support and a 5,150mAh battery. UMIDIGI claims that inbuilt AI helps the battery last longer over time by learning usage patterns and habits.
https://www.notebookcheck.net/UMIDIGI-announces-the-F1-an-Android-9-0-5000-mAh-battery-phone-for-less-than-US-250.382096.0.html