I also want to upgrade my BV9900 8GB 256Gb. I just bought this product and expect to receive this tomorrow.
I need to upgrade because of using my hearing aids properly.
What is the problem not to upgrade the BV9900 to Android 10? Because you have got aan upgrade for the BV9900Pro and you have the BV9900E with Android 10.
So please, convince your tech guys to make this upgrade available.