While connecting to a phone via Bluetooth is the easiest way. And I’m really shocked Hammerhead didn’t do BT. I put in a cheap data sim (less than $20 one time so far) and it solved all of these problems. Auto upload is just fine to Strava etc.
And I find the integration with RWGPS super nice - much better than my v1 Bolt. You just have to pin a route on RWGPS and it auto syncs to the K2.
I miss the TR integration a ton though. Ended up having to create workouts most days to load to my K2. Made using alternates for outside workouts this last summer a non starter unless I had time to create and push the workout….