It depends if it's compatible with the one you have. Example, if you're in Fido plan (sim card is written Fido on it) & that the place where you purchased the motorola phone is at Fido.. Then yes, it would work. But if it was Fido sim with a Rogers phone, then No. Unless if it's a "unlocked"phone, you can put any sim card in it. Those are more expensive, though. If you have any more questions,ask any of the employees working there. Good Luck !