Hello @Andydonny
Samsung phones typically hold all the required bands and frequencies to allow it to be used on different networks abroad.
You would need to check with your network if your account allows roaming and if they have a roaming agreement with the countries you'd like to visit.
This is usually on their support sites or via their customer services.
You would also need to turn On roaming in Connections > Mobile Networks > Turn on Data Roaming.
Most Samsung phones come unlocked however do double check perhaps by using a different network sim card in it.
If needed you could use a local sim in those countries as longlasting the phone is locked.
To remove any region lock make sure you make a local call in your own country for at least 5 minutes.
You can check the frequencies and bands via https://www.google.com/amp/s/m.gsmarena.com/samsung_galaxy_a35-ampp-12705.php
And then look at what networks that are used in thise countries and google what frequencies and bands they use.
Enjoy your journey.
If i can be of any further help please don't hesitate to ask 😎
Daily Driver > Samsung Galaxy s²⁵ Ultra 512Gb ~ Titanium Black.
The advice I offer is my own and does not represent Samsung’s position.
I'm here to help. " This is the way. "
