You can use the BlackBerry Link software to transfer personal content between phones. I believe that your Curve uses a now obsolete mini-SIM whereas the Z10 uses a newer micro-SIM so you'll need to pick up a new SIM card. You can switch the SIM card registered to your line via the Phone tab in Self Serve. If you're buying a new Z10 from Koodo, you should be getting a new SIM card along with it. If getting a used one or buying elsewhere, you'll need to buy a micro-SIM from Koodo or an authorized retail partner (BestBuy, Mobile Shop, etc.). It's $10 for postpaid (monthly) or $20 for prepaid.