I have an iPhone 4 with no sim card (it is arriving in a few days) the 4 is completely wiped. I want to be able to put some music and movies on it but it won't allow me to set it up without a sim card. I have an iPhone 6+ WITH a SIM card that is full of all sorts of important things. My question is, if I remove the sim from the 6 and put it in the 4, would I be able to add new music/movies/ content to 4 without damaging/deleting/upsetting the iPhone 6 once I return the sim card to it? Thank you in advance.