Hey, just had a few questions that I can't seem to find clear answers to about selling an iPhone...sorry if these have been asked 1923874 times before. I'm trying to sell an iPhone 4s and 5 both on verizon. 1. Do I remove the sim cards or leave them in? 2. Do I put the sim card from my iPhone 5 into my iPhone 6+ when it arrives or do I just need to throw it away? 3. How can I go about getting these phones unlocked so that I can sell them for more? Is it worth doing? 4. Is there anything else I should know or an article/guide I can read? Thank You!