The DTEK app is useless
Practically none of the reviews point out that whilst the DTEK app will notify the user that a permission is being used *it will not block it*. Useful as a chocolate teapot.
If Blackberry had added this capability/merged in a more friendly version of XPosed or similar I'd be impressed.
As it is, they're mildly lauded for meeting the minimum standard of issuing timely security patches. THIS IS NOT A FEATURE. The other manufactures should be given a negative rating until they actually support their products.
It's fine, though, no-one cares - chucking your phone into landfill after two years because it can't be updated and is insecure as hell is standard.