I recently bought an amazon echo dot 2nd generation ( smart home, voice control device from amazon which runs with their voice recognition service Alexa ) after struggling with open-source voice recognition projects (jasper, raspberry pi).
Long story short, this device is running on android 5.1, with a mediatek cpu (MT8163) and i'm trying to gain access to it via usb.
When plugged via usb to a computer, a MT65XX preloader is first briefly detected, then it boots normally. I have no access through adb (and no screen to change settings). I found the way to boot into fastboot (hold action button on boot for those interested), but most of the useful commands (flash, boot,...) end with a "remote: the command you input is restricted on locked hw".
I got an answer for getvar all thought:
(bootloader) lk_build_desc: 0e1d0d9-20161018_220224 (bootloader) prod: 1 (bootloader) unlock_status: false (bootloader) unlock_code: 0x627cf130f18b078f (bootloader) serialno: G090LF09646208F0 (bootloader) max-download-size: 0x6d00000 (bootloader) warranty: no (bootloader) secure: yes (bootloader) kernel: lk (bootloader) product: BISCUIT (bootloader) version-preloader: 0.1.00 (bootloader) version: 0.5 all: Done!! finished. total time: 0.004s
If i'm not clear enough (I'm not an expert in android dev), feel free to ask.