Originally Posted by Darkimmortal
Serial numbers play a big role too, my brother got his z1 compact a few weeks after me and he hasn't even received the 2nd 4.3 firmware on PC Companion or OTA
Ditto here. I have a SIM-free UK phone bought from an independent retailer and never received the second 4.3 either (in any form). Do you think your network operator affects the OTA update if you bough SIM-free from an non-network-operator? (I'm on O2-UK network). Was your brother also on Giffgaff like you?
As for your 4.4, did you receive an OTA update notification as well as via PC Companion?