No - calls to service numbers (numbers starting with 084, 087 ) are chargeable, as are calls to corporate numbers beginning with 05.
If you’re going to be making a chargeable call, you'll need to buy an out of plan add-on in advance of making the call.
An out of plan add-on simply puts a little money into your SMARTY balance, which you can use any time you want.
Just so you know, unlimited calls include: standard UK landlines (starting 01, 02 and 03), freephone numbers (starting 080) and standard UK mobiles (starting 07). This includes calls to and from Northern Ireland and the Channel Islands.
Also, calls to 101 are free, as well as the NHS 111 and 119 services.
Please note that, at the moment you can't currently call the following numbers with any of the SMARTY plans:
Premium numbers beginning with 09 or 070
Satellite numbers (numbers that start with 0088 or 0087)
Directory enquiries (118)