It's an interesting conundrum for folks who buy the Karoo. Unlike Wahoo and Garmin, it doesn't use BT to connect to the phone (excepting call and text notifications from the phone). They've skipped BT and use WiFi, from whatever source. If you feel you need data connectivity, you can either do the HotSpot route to a phone, which potential reduced battery life on the phone, or add a SIM card to the Karoo, at whatever that costs. I've been researching the SIM card route to find the cheapest option as I can see sideloading some Android apps for real-time weather (wind, alerts) and radar. Arguably the lack of BT makes the unit somewhat more reliable than a Garmin, whose BT reliability issues go back years and have never really been solved. HH decided to skip that nonsense it seems. But when you end with up with even a cheap SIM card, you are really close to being a cell phone, all that's missing is the ability to make a call and talk to someone.