Mr Bean, 43, telephoned his mother Lynne, who lives in California, last week.
''It was a very brief call,'' Mrs Bean said. ''He said he would call back. He has not called back yet.''
News that Mr Bean has been in touch will come as a relief to friends on Phuket and in Aspen, Colorado, where Brett worked as a ski instructor. Out of the snow season, he lived on Phuket.
The alarm was raised with Phuket police when Mr Bean failed to catch flights from Phuket back to the US as scheduled last November, leaving his mother and his father, Wayne, waiting and concerned at Los Angeles airport.
His parents flew to Phuket and a 50,000 baht reward was posted for information. Details of the flights and his passport were later found in his bungalow. There were no signs of a disturbance.
Security camera images from Phuket's west coast holiday districts of Karon and Patong show a man who could have been Brett making ATM withdrawals and shopping.
''We still do not know where Brett is or what happened to him,'' said Mrs Bean, who made a second trip to Phuket in search of her son earlier this year.
The Beans hope Brett will get in touch again soon.