In the crown-ether complex, the metal ion fits into the cavity of the crown ether and is solvated by the oxygen atoms. The exterior of the complex is nonpolar, masked by the alkyl groups of the crown ether.
Arrow Alerts. Location-enabled apps and services track your iPhone by periodically querying it for location-based information. They may do this while being used or running in the background on your device. A little arrow appears on the iPhone's upper-right corner to advise you when data is shared. Arrows also appear within the Location Services settings screens to indicate when and what kinds of information was shared with whom.
iPhone Alert Sounds in iOS 7. To turn the iPhone ringer off and use silent mode, all you need to do is flip a switch. On the upper left-hand side of the iPhone is a small switch. It's just above the two volume buttons and below the phone's corner. This is the iPhone's ringer control switch.To turn the iPhone ringer off and put the phone into silent mode, simply flip this switch down towards the bottom of the phone.o turn the iPhone ringer off and use silent mode, all you need to do is flip a switch. On the upper left-hand side of the iPhone is a small switch.