How to deregister AT&T TL86009 handset without base

SOURCE: Hard reset of KX-TCD580 Base

Go to this link; http://panasonic.co.uk/customer-Support/download-centre.asp and input "KXTCD580" in the search box - after a few disclaimer screens you get to the manual for your phone. page 29 details reset for the handset Page 32 details base unit reset Page 48/49 details cancelling handsets to the base Hope this helps, please post again if you are still having problems with your phone :)

SOURCE: How to clear all registrations from the base

One has to completely deregister all handset by pressing end and # keys together till complete de registration is shown on handset screen. if the de registration is not done as above stated method the hand set will not register will show connecting on hand set screen.

SOURCE: ADDING HANDSET SAYS OUT OF RANGE

A search of Uniden support only said to call 1-800-297-1023 with handset registration issues. The rep picked up quickly and walked me through the reset procedure. Here it is step-by-step:

1. Remove battery
2. Hold down the * and # buttons and reinsert battery. You should hear a long beep. If not retry. (This is a bit awkward but hold the handset upside down and it's workable)
3. Screen will be blank. Immediately press the right soft menu button.
4. Screen will report that EEPROM is clearing and then state EEPROM Clear Ok
5. Remove battery (yes again)
6. Reinsert battery (this time there's no need to hold down any buttons)
7. Handset will reboot with Welcome screen and then state that phone must be registered (this is the status a handset should be in from the factory)
8. Place handset on base and it will register as normal

SOURCE: DeRegistering a Damaged Cordless Phone???!!!!

I have a Panasonic KX-TG6700 base unit and KX-TGA670B handsets. We had a similar problem where we were no longer able to deregister the handset using the handset itself. We wanted to be able to use that slot that the broken phone was still occupyng. The solution that we found in the manual online was to hold down the intercom button for 3 seconds until the "in use" light turned on. Then press and hold the number of the extension you want to deregister until it beeps. At this point the base unit has freed that extension.

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

Uniden TRU 8888Handset Reset (De-Register): 1. Remove Battery. 2. Reconnect battery while holding down "*" and "#" key. 3. Then press the right upper soft key under the LCD. 4. Press the "End" key. 5. Phone will be ready to register to the base.