With the first batch only generic (and I mean non-branded) devices and the largest customer based locations received the latest firmware, all the others (mostly branded phones) will receive it after approved by the providers (=one or two weeks later, based on Sony's update roll-out timing from the past).
In Vietnam, there's no operator which sells Z2 (D6502), Z2 comes from Sony distributor (Sony Store, Sony authorized reseller stores).
At the beginning, Sony did't have enough Z2 because huge number of pre-orders, this time is the same.
But Sony has left us, 402 firmware which has been rolled out in may, now, it's nealy august...
Sent from my D6502 using XDA Premium 4 mobile app