Just received a firmware update for Xperia XZ Premium (updates also available on XZ1 and XZ1 compact) from 47.1.A.12.179 to 47.1.A.12.205, for 01 June 2018 Android security patches.
You might also receive a notification directly to the Xperia device about the latest update.
For now, let us know what you think or impression regarding the latest update.
Disclosure: Sony, Xperia XZ Premium – Info / Logo / Images / Pictures have a respective copyright. We used it for demonstration purpose only.
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Sony Mobile – Official Site

yes i got it. thanks for the update.
still wifi issue? how do you resolved it?
seems the issue doesn’t resolved however my phone got faster.
no difference. sorry sony, i guess security patches only that changed.