После множества безуспешный попыток обновления и одной успешной, девайс упал в fastboot:(
usb 1-7: new high-speed USB device number 52 using xhci_hcd
usb 1-7: New USB device found, idVendor=413c, idProduct=81d7, bcdDevice= 0.00
usb 1-7: New USB device strings: Mfr=1, Product=2, SerialNumber=0
usb 1-7: Product: QUSB_Fast_Enum_SN:4F0FD483
usb 1-7: Manufacturer: Qualcomm CDMA Technologies MSM
usb 1-7: USB disconnect, device number 52
usb 1-7: new high-speed USB device number 53 using xhci_hcd
usb 1-7: New USB device found, idVendor=413c, idProduct=81d6, bcdDevice= 1.00
usb 1-7: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-7: Product: DW5821e Snapdragon X20 LTE
usb 1-7: Manufacturer: DELL
usb 1-7: SerialNumber: 4f0fd483