This is a connector for the geocaching-application GeOrg. It's useless if you do not have GeOrg installed.
It connects GeOrg to the german geocaching-site Opencaching.de. It's not very useful if you are not in Germany :)
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Allows the application to access the phone features of the device. An application with this permission can determine the phone number and serial number of this phone, whether a call is active, the number that call is connected to, ect.