I just purchased from Vtech LS6475 plus two accessory handsets LS6405. The two handsets that were packaged with the base registered without a problem. The two access. hs's are not registering. They go through the cycles and each time they come up with 'registration failed.' Help!

SOURCE: Uniden DCT648 register phone problem

I have contacted Uniden about solving this problem. They suggested I clear the eeprom on the handsets and reset the base. To clear the eeprom detach all of the batteries and reattach while holding the star and pound. You'll hear a beep. Press select and the unit will clear the eeprom. Now hit end and the unit will say "Welcome...something or other". Next unplug the base unit reattach while holding delete. Next hit delete twice...the base is reset. Apparently this is the last possible solution to marrying the handsets and base. This didn't work for me and the units have been declared dead. Good luck in solving your electronic problems.

SOURCE: handset wont register

Unplug the battery and try again. Worked for me.

SOURCE: how to deregister a handset without the base with which it orginally registered

I successfully reset uniden TCX800 handset by reconnecting the battery while holding the '*' and '#' key, then press the right upper soft key near LCD.

SOURCE: How to I reset the base for a Vtech VT-2431

This worked for me after lots of digging....If you have already tryed reregistering your handsets and can only get two-or three to work try this and deregister them and re-register. If your base model number is vt2431: Take the handset out of the base, press **335782 on the dial pad of the base. (do not have the line active or anything , just put the (2) stars and 335782 in (no spaces) on the base unit. This will de-register all of the handsets at one time.

SOURCE: My vtech 5825 screen says NOT REGISTERED and does not work

Place the handset in the charger and press find handset for 4 seconds.This will register the handset. do the same for other handsets.