@ikoz said in Ubuntu Touch ARM TrustZone Support:
Is the manufacturer the chip's (e.g. Qualcomm) or the phone's who signs the keys
It would stand to reason that the device manufacturers would be the ones doing th signing with their keys. Or better said, whoever is responsible for the OS image that is pre-installed on the device.
If it's the latter then do all devices which have UT pre installed also have locked bootloader?
I expect that they could do so. But not having such a device myself, I cannot say for sure.