It is very easy. Just don't go to a Fido store otherwise you might get a hard time about having to be a cellular customer. The retail partners are super willing to earn commission on any sale. I got my new lines at a T-booth store at the local mall back in January. It was the nearest store that had the GPad IV tablet in stock. Well actually it was not in stock at that particular store, they imported it for me from a store in a different province. Since the tablet is free as long as I commit to staying for 2 years, it is a no brainer when they will gladly reduce the monthly fee to $7.50 for 24 months.
Public Mobile 2016 fall promo, $23/1GB, $38/5GB, $28 RBC 5GB promo