Permanent engaged tone on BT Studio 1100 handset?

You've probably bought a new phone by now but I had the same problem.

First I reset the main handset by holding down the R button (bottom left) until the phone turns off. Remove the batteries. When putting the batteries back in hold down the * button. Default should come up, press tick and enter the pin. On the base hold the page button until it beeps and the handset should register. Then go into the menu - setup - pin code. Change the pin and it should work fine.

Andrew
March 2012

See http://www.howtomendit.com/answers.php?id=91238
Use the "Reset if you have forgotten your PIN code" instructions.

Fone
August 2011