[FociS8nt]

i know that in the states they have a thing that came out in last december called LNP or line number portability it enables you to swtich between carriers keeping the same phone number. Not to sure if here in canada they can do it I imagine they can now that we too have spread to GSM phones. As for using the nokia on pay as you go...most carriers have a set list of phone models that can be used on their prepaid system I believe rogers has one but quite a large one so depending on that model of nokia you should be able to switch from post-paid to prepaid with no problem.....hopefully that helps :D