Have turned my phone off/on.
Have turned off automatic network selection.
Have turned off 4G.
Have turned on roaming.
Welcome to the community.
Whereabouts in the world are you?
Could you try logging into your My EE account and turning international calling on? You can find it under Menu > Manage Device.
Let me know if that works.
One of these options may help you find the answers you need.
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