WEST COVINA, Calif. — After a boozy Saturday night, Sarah Maguire awoke the next morning to find that her iPhone was gone. Her roommate’s phone was gone, too. Were they at the bar, she wondered, or in the cab?
Using the Find My iPhone app on her computer, she found that someone had taken the phones to a home in West Covina, 30 miles east of her West Hollywood apartment.
So Maguire, 26, a yoga instructor, did what a growing number of phone-theft victims have done: She went to confront the thieves — and, to her surprise, got the phones back.
“When I told my mom what I did, she thought I was crazy,” Maguire said.
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With smartphone-theft rampant, apps like Find My iPhone offer a new option for those desperate to recover their devices, allowing victims like Maguire to act when the police will not. But the emergence of this do-it-yourself justice — an unintended result of the proliferation of GPS tracking apps — has stirred worries among law-enforcement officials that people are putting themselves in danger, taking disproportionate risks for the sake of an easily replaced item.
“This is a new phenomenon; it’s not simply running after the person to grab the phone,” said George Gascón, the San Francisco district attorney and a former police chief. “It opens up the opportunity for people to take the law into their own hands, and they can get themselves into really deep water if they go to a location where they shouldn’t go.”
“Some have been successful,” Gascón said. “Others have gotten hurt.”
Smartphones have become irresistibly delectable morsels for thieves. More than 3 million were stolen last year, according to a survey by Consumer Reports. Since 2011, cellphone thefts have risen more than 26 percent in Los Angeles; robberies involving phones were up 23 percent in San Francisco just last year. In New York City, more than 18 percent of all grand larcenies last year involved Apple products.
Victims are often desperate to recover their stolen phones, which, as home to their texts, photos and friends’ phone numbers, can feel less like devices than like extensions of their hands. While iPhones may be the most popular with thieves, apps that can track stolen phones using GPS are available for most smartphones.
Although pursuing a thief can occasionally end in triumph, it can also lead to violence, particularly because some people arm themselves — hammers are popular — while hunting for their stolen phones.
In San Diego, a construction worker who said his iPhone had been stolen at a reggae concert chased the pilferer and wound up in a fistfight on the beach that a police officer had to break up. A New Jersey man ended up in custody himself after he used GPS technology to track his iPhone and attacked the wrong man, mistaking him for the thief.
Cmdr. Andrew Smith, a spokesman for the Los Angeles Police Department, called the trend “a big concern.”
“It’s just a phone; it’s not worth losing your life over,” he said. “Let police officers take care of it. We have backup, guns, radio, jackets — all that stuff civilians don’t have.”
But although police departments have devoted more resources to combating smartphone theft, most cannot chase after every stolen device right away, especially if the phone was left idly on a bar rather than seized in an armed robbery.
And despite the obvious risks, the lost phone’s location — blinking on a GPS app — is a siren song many find too alluring to ignore.
After Nadav Nirenberg lost his iPhone on New Year’s Eve 2012, he realized someone was sending messages from his OkCupid account. He lured the thief to his Brooklyn apartment building by posing as a woman and flirting with him on the dating service.
When the thief arrived with a bottle of wine, expecting to meet “Jennifer,” Nirenberg went up behind him, hammer at his side. He slapped a $20 bill on the thief, to mollify him and compensate him for his time and wine, and demanded the phone. The thief handed it over and slunk away.
“I was trying to avoid conflict,” Nirenberg said. But he added that, if robbed again, he would go to the police.
Police chiefs have advocated another solution that they say could end smartphone thefts altogether: a mandatory “kill switch” that would render stolen phones inoperable and therefore unattractive to thieves.
“This would all be moot if we had an industrywide kill switch,” Gascón said.
After years of pressure, phone makers, including Apple, have begun offering this feature.
In the meantime, the thefts continue to outpace the police’s ability to handle them.
When Maguire and her roommate called the Los Angeles police, she said, they were told they could go to West Covina themselves and call 911 if they felt threatened. Smith said West Covina had probably been too far afield for detectives to go that day.
Maguire debated for hours before deciding to go after her phone.
“We looked at the area on Google Maps, and it wasn’t that sketchy,” she said.
The house where her phone had been taken was on a quiet residential street, with a well-tended yard and palm trees out front. Inside, she could see children running through the hall, a sign, she hoped, that she was dealing with opportunists, not career criminals.
She knocked on the door. It swung open, revealing a large man, about 30. “I think you have my phone,” Maguire said haltingly, as she later recounted the conversation. The man denied this. But she pressed him, insisting that GPS had led her to that address.
The man ducked back inside. The blinds in the living room, which had been open when she arrived, slowly closed.
Finally, he returned with one phone, then — after more negotiation — with the second. Unsure if the danger was over, Maguire sprinted to her car.
Still, when she was asked by text if she would pursue a future pickpocket, she typed an unequivocal reply on her recovered phone: “Yes, def.”