So, I got a hand-me-down iphone 5. Ordered the SIM card from Airvoice, read MMM's instructions on inserting card and porting #. However, as a non-tech, never owned a smart phone person, I am not sure how to actually open the phone!! I see nothing to slide or snap or whatever. I don't want to force anything and possibly break it. Is there a trick I'm missing?? Thanks for any advice!