Hi all, So once my 5s gets here, I'm shipping my iPhone 4 off to Gazelle. I'm reading the guides online about how to erase content/data before doing that. I just wanted to check - am I missing anything? 1. Back up the old phone 2. Turn off iMessage 3. Erase content/settings (restore to factory default) Ok, so after that, some guides said to remove the SIM card too. So I remove the SIM card. When I get the 5s, do I need to put the old SIM in there? And if not, what do I do with the old SIM? Just toss it? Thanks!