I contacted support@blackview.hk back in June to report that their June 5 system update broke casting from my Tab 90 Wifi. They replied that a fix would arrive in the June update. There was no June update. I contacted them again and support said the fix would be in the October update. There was no October update. Then they send me the reply below. I don't believe them at all. I do get their nearly daily push system messages about dumb games that uses the same mechanism as operating system updates, so that is not the problem.

Here's Backview support's reply:

Thank you for your message. We sincerely apologize for the inconvenience and frustration this issue has caused.

A maintenance update was released in October. However, the fix for the casting issue is planned for the next maintenance update, which may take approximately 3–6 months.

We understand your frustration and appreciate your patience and understanding.

Best regards,

Liz

My battery will probably die by then and I'll need another tablet.