Answer – 0300 numbers are not technically free to call. They costs the same as any call to a standard 01 or 02 landline number.

However, if you have any “free” minutes as part of your call package (applies to both landline and mobile phones) then any calls to these numbers will be included as part of your allowance and not charged extra. So provided you have minutes left then yes they are free to call as you wont pay anything extra.