Download latest Android 7.1.1 stock firmware for Sunvell T95Z Plus TV Box from here, here or here. Here you can read about the unboxing Sunvell T95Z Plus Android TV Box. Download previous firmware from here.
Archive: T95Z Plus Firmware Update 20171027
Model: Sunvell T95Z Plus TV Box
Image file size: 549 MB
Platform: Amlogic S912
Image name: T95Z Plus.img
Inside archive: firmware + T95Z Plus aml_sdc_burn.ini + T95Z Plus u-boot.bin.sd.bin
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.