Fido has better day rates (as low as $0.20/min). Rogers has better evening and weekend rates (as low as $0.01/min). Text messages are expensive on either, at 15 cents per sent SMS no matter which plan you're on.
You might also want to consider 7-11 wireless on your unlocked RAZR as well if the phone will be used exclusively in Canada, it's a Rogers virtual carrier and their rates are 20 cents/minute and 5 cents for each sent and recieved SMS.
In any case, if you find that your sister ends up using the phone heavily, you'll probably need to put her on a plan (even if it's a month-to-month Fido plan).
You might also want to consider 7-11 wireless on your unlocked RAZR as well if the phone will be used exclusively in Canada, it's a Rogers virtual carrier and their rates are 20 cents/minute and 5 cents for each sent and recieved SMS.
In any case, if you find that your sister ends up using the phone heavily, you'll probably need to put her on a plan (even if it's a month-to-month Fido plan).