You may have disabled the data roaming on the Samsung Galaxy S8. How to re-enable data roaming and what to look for, we explain below:
Activate data roaming on the Samsung Galaxy S8
To do this, open the App menu from your home screen and then:
Settings -> Connections - -> Mobile networks
Activate here now the "data roaming". (This is only possible with an activated data connection!)
Attention when traveling outside your country
Some countries have expensive Roaming costs. Here you must remember to turn off the mobile data roaming again, otherwise extremely high costs may arise.
You now know the procedure to re-enable data roaming on the Samsung Galaxy S8.