So, I need the battery replacing on my 6S under the replacement programme, no issue there. However, I've noticed that Apple asks for your passcode when an iPhone is taken in for service. This strikes me as quite odd for a company so concerned with privacy. I'm wondering, will Apple do a battery replacement without requiring my passcode? I know they like to have users demonstrate that Find My iPhone can be turned off, but I don't see why they'd need my passcode which would give their staff access to all my data including sensitive items in my keychain. Failing this, I'd just have to wipe the iPhone clean which seems like a hassle for a service that will take an hour or so. Any ideas?