I would like to ask you, where can I get an Android 10 upgrade for my bv9900 PRO. Thank you for your answer.
Android 10 EU version for BV9900 PRO https://mega.nz/file/iSxRQAjA#hVwMxQp0lBvgeawDYUR1wroF9XeILHH1naRZP7lTB_U
To copy it without extracting it to the phone's memory and in the software update menu, select the manual update, including the downloaded .zip file and you will already start the update. Wait patiently, it will take up to 3-5 minutes for the first start.
At least that's how I did it and it worked
Sorry for the bad English, I did it with Google Translate.
Tomi, from Hungary