As we all know, the UK is one of, if not the last to receive firmware updates for the Z1, this is if we receive them at all.
We are told that the reason for this is that some UK carriers refuse to sign off the firmware, presumably due to inherent bug and stability issues. As a result this should mean that UK firmwares are the most stable and bugfree.
Is this true in your opinion. Have you run different 'regional' and or UK 'carrier' versions of the same firmware, and is the UK's the best.
Please let me know, especially in relation to the KitKat upgrades ('681' and '757').