[Xiaomi Mi A1 Guides, News, & Discussion] t000x:
Hey,

you need to reflash the modem and other partitions, had the same problem as you have.

Download newest image:

http://en.miui.com/download-333.html

Use this commands as a batch next to the fastboot.exe, change the image path to your folder with replacing. It won't wipe/delete anything!

fastboot flash modem_a C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\modem.img || [MENTION=279333]ECHO[/MENTION] "Flash modem_a error" && exit /B 1

fastboot flash modem_b C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\modem.img || [MENTION=279333]ECHO[/MENTION] "Flash modem_b error" && exit /B 1

fastboot flash sbl1 C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\sbl1.img || [MENTION=279333]ECHO[/MENTION] "Flash sbl1 error" && exit /B 1

fastboot flash sbl1bak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\sbl1.img || [MENTION=279333]ECHO[/MENTION] "Flash sbl1bak error" && exit /B 1

fastboot flash rpm C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\rpm.img || [MENTION=279333]ECHO[/MENTION] "Flash rpm error" && exit /B 1

fastboot flash rpmbak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\rpm.img || [MENTION=279333]ECHO[/MENTION] "Flash rpmbak error" && exit /B 1

fastboot flash tz C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\tz.img || [MENTION=279333]ECHO[/MENTION] "Flash tz error" && exit /B 1

fastboot flash tzbak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\tz.img || [MENTION=279333]ECHO[/MENTION] "Flash tzbak error" && exit /B 1

fastboot flash devcfg C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\devcfg.img || [MENTION=279333]ECHO[/MENTION] "Flash devcfg error" && exit /B 1

fastboot flash devcfgbak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\devcfg.img || [MENTION=279333]ECHO[/MENTION] "Flash devcfgbak error" && exit /B 1

fastboot flash dsp C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\adspso.bin || [MENTION=279333]ECHO[/MENTION] "Flash dsp error" && exit /B 1

fastboot flash sec C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\sec.dat || [MENTION=279333]ECHO[/MENTION] "Flash sec error" && exit /B 1

fastboot flash splash C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\splash.img || [MENTION=279333]ECHO[/MENTION] "Flash splash error" && exit /B 1

fastboot flash misc C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\misc.img || [MENTION=279333]ECHO[/MENTION] "Flash misc error" & exit /B 1

fastboot flash aboot C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\emmc_appsboot.mbn || [MENTION=279333]ECHO[/MENTION] "Flash aboot error" && exit /B 1

fastboot flash abootbak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\emmc_appsboot.mbn || [MENTION=279333]ECHO[/MENTION] "Flash abootbak error" && exit /B 1

fastboot flash boot_a C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\boot.img || [MENTION=279333]ECHO[/MENTION] "Flash boot_a error" && exit /B 1

fastboot flash boot_b C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\boot.img || [MENTION=279333]ECHO[/MENTION] "Flash boot_b error" && exit /B 1

fastboot flash system_a C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\system.img || [MENTION=279333]ECHO[/MENTION] "Flash system_a error" && exit /B 1

fastboot flash system_b C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\system.img || [MENTION=279333]ECHO[/MENTION] "Flash system_a error" && exit /B 1

fastboot flash lksecapp C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\lksecapp.img || [MENTION=279333]ECHO[/MENTION] "Flash lksecapp error" && exit /B 1

fastboot flash lksecappbak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\lksecapp.img || [MENTION=279333]ECHO[/MENTION] "Flash lksecappbak error" && exit /B 1

fastboot flash cmnlib C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\cmnlib.img || [MENTION=279333]ECHO[/MENTION] "Flash cmnlib error" && exit /B 1

fastboot flash cmnlibbak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\cmnlib.img || [MENTION=279333]ECHO[/MENTION] "Flash cmnlibbak error" && exit /B 1

fastboot flash cmnlib64 C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\cmnlib64.img || [MENTION=279333]ECHO[/MENTION] "Flash cmnlib64 error" && exit /B 1

fastboot flash cmnlib64bak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\cmnlib64.img || [MENTION=279333]ECHO[/MENTION] "Flash cmnlib64bak error" && exit /B 1

fastboot flash keymaster C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\keymaster.img || [MENTION=279333]ECHO[/MENTION] "Flash keymaster error" && exit /B 1

fastboot flash keymasterbak C:\Users\YourName\Downloads\tissot_images_7.10.30_20171030.0000.00_7.1_82ffdfe70c\tissot_images_7.10.30_7.1\images\keymaster.img || [MENTION=279333]ECHO[/MENTION] "Flash keymasterbak error" && exit /B 1