I just downloaded
t89j-jk-bv5000-33mgu-hd-128g16g-fdd3m-bom21_BV5000_C1_Blackview_V1.5_20160612_R15_release.tar.gz
But trying to perform a wireless update doesn't work with it
because a ZIP is expected and the GZ-file won't show up.
Do I have to convert /rename / unpack it?

BTW: OTA always answers "Your system is up to date"
though i have 5.1 installed (V1.2_20160608)

Thanks for any idea!
francis