I have an HTC bootlooped by an OTA, hence my now having a OnePlus3. Getting fed up with all this nonsense. Seems to me the android ecosystem is just too wild west, especially for such an important device, and may now have to head to apple. I see I also have this EngineerMode, data usage 1.4MB since Aug 7, modify system settings enabled. When I tweeted them about the recent data collection issue they replied with "it's standard industry practice".
It hasn't been released yet, but Purism recently smashed their fundraising goal for the Librem 5. From the description linked to below:
> Librem 5, the phone that focuses on security by design and privacy protection by default. Running Free/Libre and Open Source software and a GNU+Linux Operating System designed to create an open development utopia, rather than the walled gardens from all other phone providers.
Are you asking about "linux" meaning a non-Android linux phone?
If you include Android -- I have had a satisfactory experience with both the Samsung Galaxy S6 and LG Nexus 5x. The 5x did bootloop recently but Nexus repaired it (and upgraded to 32GB) beyond the end of their warranty.