Hi ​@longbo43,

Thanks for your post.

If you have unlimited minutes, a charge wouldn't normally be applied for standard UK calls. However, there are certain types of calls that aren't included in your allowance and can still be charged separately.

Examples can include:

• International calls.
• Calls made while roaming in certain destinations.
• Premium rate numbers.
• Service numbers.
• Directory enquiry services.
• Other non-standard numbers that aren't included in your allowance.

You can find a full breakdown of chargeable calls and services here: https://www.idmobile.co.uk/help-and-support/call-charges

It's worth reviewing your itemised bill alongside the information in the link above, as this should help identify which call or service the charge relates to.

If you're still unsure after checking, please let us know and we'll be happy to point you in the right direction.

Regards,

Gemma 

The iD Mobile Social Media Team