Welcome to the community and thanks for taking the time to post here on the forums.
I’m sorry to hear of the issues that you’re having with your mobile at the moment, are you calling more than one country and having the same issues or is this just happening with calls to one particular country?
Does this happen at all times of the day and do you have full signal, when this is happening?
Thanks for coming back to us about this, I am sorry your international calls to Hungary are having this issue.
Can I ask if you have any issues hearing them if they call you?
Can I also ask if you have another handset to test the SIM in to see if the same issue occurs on a different phone? If the issue disappears it will be a problem with your handset, if it still occurs then it will be an issue with the SIM.