Just came back from the US and I used simoptions, 5gb e-sim for $20 ish. Was on T-Mobile and pretty faultless and after 2 weeks I still had circa 2gb left on it even with poor wifi where I was staying.
For bike shops, I found Ken’s Bike Shop in Visp to be brilliant when I needed new tubeless valves.
I did most of my riding around Zermatt and Täsch but for family riding you could ride the Matterhorn Trail which runs between Visp and Zermatt. I really liked a chilled out and back from Visp to St Niklaus. If you want to come down to Zermatt then a Gornergrat or Trockener Steg descent are awesome, or the Europaweg from Sunnegga to Täsch. Amazing views.
I rode the Jakobshorn Trilogie last year and it’s great. I was was on 150/140 trail bike which was about right as none of the three routes need a DH bike. I did it on the order Dischma, Sertig then the flow trail down the middle. One of my favourite days of riding in Davos. Let me know if you need any gpx files for other rides in and around town.
I just use the basic Strava, but have paid for Veloviewer as what he does with the Strava data is amazeballs. Also worth looking at if you use the Chrome browser is the Stravistix extension which is really, really good for segment PR chasing.
On road, the etrex 30 gives turn by turn directions, I use it to give me short cuts on the road bike to certain locations, just set a waypoint where you want to go and it gives you options of off road, on road for time or on road for distance.
I think you get a lot for your money with the Specialized Allez range and also the bikes at Decathlon. What’s your budget? You’ll find Shimano Tiagra/105 brakes v confidence inspiring compared to cheaper bikes.
If only someone would invent a rubber tube to sit within the tyre. You could put air in this tube and it would inflate the tyre. I’m going on Dragon’s Den.