I got a replacement for my old cracked iPhone 4 from Apple (had to pay $149) and sold it on eBay. The guy at Apple said "I didn't activate it so here you go." and the phone just shows the "Plug into iTunes" on the screen (it's on 4.3.5). It does have a SIM card installed. Do I need to activate this before I ship it out or will the person that receives it be ok with how it is? Is it better that it's not activated?