I might need to install an invisible shield on my iPhone soon. So, just a question. If I turn the phone completely off, can it still recieve SMS? So when I turn it on, all my new SMSs will be there?
Well, the SMS messages will be "stored" by AT&T and delivered whenever you turn your phone on next. It'll take a few seconds or a minute after you connect to the network for them to come in, but they will arrive once you do.
I switched my phone on about 10 minutes after installing the IS, its fine no problems. Its just a precaution. Good luck, the front is easy to put on, the back not so much.