I talked to Zoomtak SW engineer about doubts which device is which.
Here are list of Zoomtak S802 devices:
- T8 (single band wifi - 8188eu, without bluetooth)
- T8 V2 (dual band wifi with bluetooth)
- M8 (dual band wifi with bluetooth)
There are two ways of identifying T8 device. 1st, if you don't have Bluetooth settings in Settings app, you have T8 (first version), otherwise T8 V2. 2nd, on bottom of box should be written on sticker V2 which stands for T8 V2 version.
Install instructions:
Download all files, put them to root of sdcard and power device on with recovery button pressed or select .zip file from Upgrade app inside Android.
These are not mine firmwares so I don't accept feature requests lol, but you can write some feedback here, maybe Zoomtak staff will read this thread

Zoomtak firmware 3.4.2:
- T8 V2 & M8 - Mega
- T8 V1 - Mega
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