Hi Serge,
Your workflow seems a bit intricate, indeed. It shouldn’t involve Bluetooth, because Reach RS2 works with the phone’s hotspot without necessity of enabling Bluetooth. You can read the step-by-step guide in our docs, and, just in case, the brief Support tip here.
In case you need only NTRIP correction input to Reach RS2, Bluetooth connection should be quite simple. You can find the description here in our forum.