If sent by USPS and customs does check it they will charge you taxes
on whatever province you live in plus a $9.95 handling fee.
If the seller uses Global shipping then you will pay the taxes and the
Global shipping fee when you pay for the phone.
If it is sent by courier then you will pay the taxes and the courier company's
handling charge when it is delivered.
Normally the courier company's handling charge is quite a bit higher than
Canada Customs and Global shipping.
If sent by UPS courier you pay at the door.
If sent by Fedex they generally leave the package
and bill you later.