To make international calls you need an active membership plan and also cash credit on your account to pay for the calls.
Membership bundled call minutes don't cover international calls.
Other than Northern Ireland landlines called using the 048 rather than 00 44 prefix.
The international call charges are listed here:
You can add cash credit to your account here:
If you need to contact 48 support about this then see the links in my signature below.
