Police officers are prohibited from searching a phone during or after an arrest unless they have obtained a warrant. The time that elapses between seizure of a cell phone and the obtaining of the warrant provides enough of a window for a person to successfully remotely wipe the contents of the phone before the police are able to secure the necessary evidence. This creates a dilemma – how can police keep people from destroying possible evidence without violating the Fourth Amendment?
Apparently, the only ‘technology’ required to protect the contents of the phone from being wiped is a simple roll of aluminum foil. When the police seize a phone, they simply have to wrap the phone in a few layers of aluminum foil and the chance of remote wiping of the phone will be almost completely eliminated. To learn more, http://gigaom.com/2013/08/28/how-tin-foil-could-prevent-warrantless-cell-phone-searches-while-preserving-evidence/.