Ok, I'll play along. Why would I ever need to use a micro sd card on my iPhone? With cloud storage and sync nowadays, I haven't touched any type of sd card for years. If you just need more storage, think about that ahead of time and get a phone with more storage. If you don't want to do that, get a case that adds more storage. Like the mophie case. It has an additional 8 hour battery and now built in storage. If you are hell bent on using an sd card for whatever reason, get a case (like the iExpander) that will accept micro sd cards. But like I said, with iCloud, skydrive, Dropbox and many others, I don't see why.