The issue focused on whether police can use a cellphone location tracking service as evidence to obtain a phone or online data without a suspect in custody.

The court ruling said the service is not subject to any limits under the Digital Millennium Copyright Act. The judge did not say how many of the 1.4 million smartphones in use globally use the technology, but said the technology's ability to track a suspect could be useful for law enforcement. The ruling comes as the FBI has launched an online tool it says can help unlock