Trump's cellphone diplomacy raises security concerns President Donald Trump has been handing out his cellphone number to world leaders and urging them to call him directly, an unusual invitation.

Perspective | ‘Hello, Bob’: President Trump called my cellphone to say that the health-care bill was President Trump called me on my cellphone Friday afternoon at 3:31 p.m. At first I thought it was a reader with a complaint since it was a blocked number.

Perspective | ‘Hello, Bob’: President Trump called my cellphone to say that the health-care bill was President Trump called me on my cellphone Friday afternoon at 3:31 p.m. At first I thought it was a reader with a complaint since it was a blocked number.

Lost your cellphone on the road? Here's how to get it back — if you take steps now Travelers, here’s a way to improve of your chances of getting your cellphone back if you lose it on the road.

At C.D.C., a Debate Behind Recommendations on Cellphone Risk While consensus holds that there is little to no evidence linking cellphone use to an increased risk of health problems, scientists and health agencies disagree about what guidance to give the public.

POLL: When Is It OK To Use Your Cellphone In Public? New research on mobile device etiquette from the Pew Internet and Life Project gave us insight into where American adults feel using a cellphone is OK -- and where it is not. Pew's researchers didn't ask

This Wikipedia founder's new venture? A cellphone carrier that puts your bill to good use. Your cellphone carrier called. They want your respect back.

Life Without a Cellphone Carrier Could you go Wi-Fi only and manage without a cellphone carrier? WSJ’s Ryan Knutson did it for 30 days and lived to tell about it. Here are some of his tips.

Life Without a Cellphone Carrier Could you go Wi-Fi only and manage without a cellphone carrier? WSJ’s Ryan Knutson did it for 30 days and lived to tell about it. Here are some of his tips.

Avoid A Hefty Cellphone Bill With These Handy Data-Tracking Apps You probably use your cellphone more often to check your email than to ring up a friend. And if you have a mobile plan with limited data, that can mean getting walloped each month with a monstrous overusage fee.