Hi everyone! My iPhone 5 arrived today and I couldn't wait to try it but I forgot about the nano sim thing, so I can't activate my phone just yet. My question is, you're supposed to exhaust the battery the first time you turn the phone on, so shall I just leave it on like this, with no usage, or shall I turn it off and exhaust it once I have a sim card? Silly question but I'm ocd about battery calibration haha. Thanks in advance! PS: this thing looks GORGEOUS!