Taking your iPhone outdoors is not a bad idea. There are many awesome outdoor GPS apps that could keep you out of trouble. You are not always going to have perfect reception though. The SatSleeve happens to be a handy accessory that turns your iPhone into a satellite phone. It is developed by Thuraya Telecommunications Company and lets you make phone calls and send messages over its network.
Thanks to the SatSleeve, you get coverage in over 140 countries. This could be especially useful if you are stuck in the outdoors and need a way to contact your loved ones. The Thuraya SatSleeve is equipped with an Emergency Call button. It lets you charge your iPhone and use it as a backup. The SatSleeve will be available starting September 10.[Source Thuraya via Gizmodiva]