TFT, iphone6s, Nav 6 and Shoei neotech2 SRL connection problems

Hi all
I'm have some connection issues between these 4 devices.
The phone connects with the neotech srl
The phone connects with the Sat nav
The Nav has the latest updates and the SRL has the latest firmware.
However the TFT will not connect with any of them.
Has anyone had a similar problem?
Any suggestions gratefully received

This video is quite interesting, but if you just want the sequence of connection, then move on to about halfway through.

https://youtu.be/LzPoILCj-aU

Hi

A couple of dumb questions:

What are you expecting the TFT to send to Nav or Phone?
Is the phone able to connect to more than 2 devices?

rgds