سلام دوست عزیز برای حل مشکل این کار ها را انجام بده
1) Put batteries in your phone and place the receiver on-hook.
2) Press Function and then the Down direction button until you see "Change Password".
3) Enter the digits 726276642 (usually it accepts a 4 digit number, but enter this number anyway) and press Enter. This is the Master unlock code.
4) Now enter you New password, enter 0000 and press Enter again.
5) Press Exit button (Function button is same as the Exit button)
6) Press Dial Lock and then press 0000, press Enter.
