Best answer by Mohammed
To confirm, the UK Dialling code is +44 not 044.
For example, the sample number 0777 111 222 3 would be +44777 222 3 (without the spaces).
So the 0 is replaced by +44.
Can you try this and confirm if this works?
EDIT: I've moved your topic to the Coverage, international & roaming section of our community.