The base for my BL102-2 handset recently died due to a power surge. Got a new one because I already had multiple handsets. Then I’m sitting there trying to figure out how to register the handset with the new base. When you have the base the handset is currently registered to it’s easy, there’s a menu option on the base. Without the base it’s, well, easy … if you can find the info.

For my own reference here’s the process:

• press the [Menu] button, enter *7890#, press [Menu] again
• you’re now in the system menu for the handset
• scroll up twice to “REGISTER CLR” and press [Menu]
• You should see a confirmation message, press [Menu] one last time.

Info found in the Q/A for the BL102-3 on Amazon.