8889 posts
Hello Cecil,
For Switzerland see http://www.myswissalps.com/si mcard.
For further afield see http://www.simcorner.com/ or get googling.
For the best value Swiss data SIM you can’t go past shop.salt.ch/en/plans/ prepay/
The actual offer may be hidden behind a 50% discount pop up which you have to dismiss to see the real deal. Hit the “X” at top right hand corner of the pop up.
It is not officially endorsed by MySwissAlps but I used this SIM when I visited in 2017 and found it great value. We have reports of another member sending weather reports to the forum from the top of Schilthorn using that SIM.
CHF19.95 (when I used this SIM in 2017 it was only CHF10 but still great value) gets you 10 days unlimited high-speed data (assuming you use it only for data and not calls as well).
Make sure your phone is not locked to your home provider. If it is then the Traveller’s WiFi is the go.