put hex file there, systems reboots, a file with the ending .RDY or .ERR is placed.
#### Moto X4
```
*#*#4636#*#* --> Telefonwartungsmenü
```
```
VoLTE sowie WiFiCall kann erst mit neuem Update kommen, da der APN von 07 auf 03 geändert wurde und die carrier-Datei muss in der Firmware abgeändert werden.
well, that it's all folks. The device can not connect to a wifi AP. The self-owned AP works so far, but it can not connect to a different AP, more precisely, it can not get an IP. the guide explains it well: https://asperti.com/2022/shelly-firmware/
```
rBoot v1.2.1-cesanta1 - richardaburton@gmail.com
Flash Size: unknown
Flash Mode: DOUT
Flash Speed: 80 MHz
rBoot Option: Big flash
Writing default boot config @ 0x7000.
Booting rom 0 (0x8000).
syѕ<EFBFBD><EFBFBD>param error, use last saved param!
however, the guide is not working completely. Some research later, I found out that rboot needs the flash size detection. Otherwise it seems to fail. you need to add `--fs detect` to get the flash size into rboot.
1. Connect the Windows host to the monitor using a USB-C to USB-C cable or an HDMI/DP+ USB-A to USB-C cable (with the USB-C end connected to the monitor and the USB-A end connected to the host). After the screen is cast normally, right-click the icon in the lower right corner of the desktop, select Open Sound settings to enter the sound settings screen, and then select Microphone (MateView GT) under Choose your input device.
2. Download the MateView GT HwMateViewGT-CAA Audio Firmware 1.0.zip at https://consumer.huawei.com/my/support/monitors/mateview-gt/
3. To download the firmware update tool, may visit https://drive.google.com/drive/folders/1j5reoECesfaabvKl_GtARPwlVXf6fLoB
4. Place the decompressed HwMateViewGT-CAA Audio Firmware 1.0.fwu and the update tool SophiaFwUpd.exe in the same folder. Double-click MateViewGT_Update.bat in the folder to start updating the firmware. Alternatively, press Shift while right-clicking the folder to open the Powershell window. In the displayed Powershell window, run .\SophiaFwUpd.exe -i ‘.\HwMateViewGT-CAA Audio Firmware 1.0.fwu’ -v 0x12d1 –p 0x10b6 and press Enter to start updating the firmware. During the update, do not remove the power cable or signal cable and keep the monitor in projection mode.
5. The message "Firmware update SUCC." will be displayed after the execution is complete. The message "Please restart monitor." indicates that the audio firmware update is successful. Restart the monitor and try again.