WASHINGTON — Sorry, Mr. President. Please surrender your BlackBerry.

Those are seven words President-elect Barack Obama is dreading but expecting to hear, friends and advisers say, when he takes office in 65 days.

For years, like legions of other professionals, Mr. Obama has been all but addicted to his BlackBerry. The device has rarely been far from his side — on most days, it was fastened to his belt — to provide a singular conduit to the outside world as the bubble around him grew tighter and tighter throughout his campaign.

Lose the BlackBerry? Yes He Can, Maybe