I have a bricked android BLUBOO X2. I rooted it, changed build.prop to set some settings so that I could boot in Ubuntu Touch(which didn't work). And now I can't boot up anymore at all, it is in boot loop.
I tried booting in recovery and then selected "apply update from ADB". It then says: 'Now send the package you want to apply to the device with "adb sideload < filename>" ... '. I did this once and it showed an error, but the weird thing/problem is that I cannot sideload anything anymore: 'error: device not found'.
I (think I) know it is connected with my (Windows 10) PC because it made a connection and deconnecting sound when booting in recovery.
How can I get my android to be connected or how otherwise can I load a ROM or change the build.prop back?