Hello @AndreaM87 👋
May I advise that the Samsung Community Forum is not an avenue to Samsung Customer Services.
This is a user to user help and discussion forum, therefore Samsung Customer Services would not see your post.
Instead to send feedback directly to Samsung the best avenue is to use your feedback section in the Samsung Members App.
As for the issues your experiencing >
If you perform a forum search you may find existing threads with some further help or guidence within.
You can reset your Network Connection.
Settings > General Management > Reset > Reset Mobile Network Settings > Reboot your phone.
Just to touch upon what the Vodafone Employee has advised >
I'm going out on a limb here and saying this Employee is maybe over egging the cake to get you to approach Samsung instead of them.
If Vodafone supplied the phone then it's Vodafone that have a Duty of Care to look after you in regards to your sim card and phone.
That said Samsung will also be more than willing to try and help too.
The issue could be the sim card to which Vodafone can help you with a sim swap ,which js the process of moving your contract to a new blank sim card.
Perhaps test your sim card in another phone to see what happens.
It can occasionally help to insert the sim card in the secondary sim slot if the phone js a dual sim model.
There is also a diagnostic tool found in the Samsung Members App.
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. "
