Yes, you can use your phone as a WiFi hot spot and provide your Discover with traffic and TT cloud data that way. In fact, due to the wonky behavior of BT on some phones, it's been my preference for quite some time.
Contrary to 'conventional wisdom' I've seen posted by some, I don't find that WiFi takes any more phone battery than BT. That's because although WiFi is a bit higher power, messaging is at much higher data rates, so it takes much less time to transmit the data.
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