According to our information, the costs are caused by active data connections. Switch off mobile data completely. Also deactivate location services, background synchronisation and automatic app updates. WLAN should also be deactivated when not in use. This way, the credit is used exclusively for telephony.

We have a special abo with Sunrise for watch only with unlimited calls and data for just 10 fr, no need to switch anything off..

This will certainly not be easy, as the watch is also designed for tracking. The location and steps and so on can be deactivated in the privacy settings, which certainly helps. Unfortunately, the emergency function and video calls are also purely via the data, so the whole thing is very annoying. I have taken out a data plan for my son that costs around five francs a month, which keeps the costs very low. A viable and good alternative would be to simply leave the watch switched off and only switch it on in an emergency. Then it would be like an emergency phone and would not incur any costs.