HOW DO I DEREGISTER A MOTOROLA MD 7151 EXPANDABLE PHONE I JUST BOUGHT TO GO WITH THE SYSTEM I ALREADY HAVE AND SO THAT I CAN REGISTER IT TO MY PHONE?

Maybe this might help.

On the Motorola L404 series, to deregister all handsets you unplug both the phone and power to the base station. Press and hold the 'find' button while plugging the power back in. The display will show "CL". Continue to hold the find button till the display shows '00' and all the handsets will show 'unregisterd'. You then proceed by registering all your handsets again in the order you want them listed.

you dont need to deregister it if you have not registered all 8 hand sets with your base unit. Just register the new one and the base will assign a new # for this new. I you had registered 8 hand sets with your base already, you need to remove(deregister0 one handset from your base(it can take only upt 8).
If it still not registering please deregister as follows:
on the base unit, press program, them mute, then enter 335#, then enter the handset number you wish to deregister.
after deregistering try to register your new hand set.

Press (menu 00, reg) an press locator for 3 secons--- than press ok in you phone.

The "END" and "#" key combination can be used for several purposes:

1) If wanting to use an ALREADY REGISTERED HANDSET on an alternate base, and if if the INITIAL BASE isn't available to deregister the handset:

1a) Press "END" + "#" until it for 5+ seconds (wait for it to beep)
1b) Choose the "Base Unavailable" option
1c) That'll deregister the CURRENT HANDSET so that it can be re-registered on ANY base.

2) If a BASE has a handset registered to it which you no longer want registered but the registered handset is missing or broken:

2a) Grab another WORKING handset which is properly REGISTERED to the BASE in question
2b) Press and hold the "END" + "#" key for 5+ seconds (wait for it to beep)
2c) Choose the "Deregister HS" menu option
2d) Pick the REGISTERED HANDSET # to de-register. (Every other registered handset EXCEPT THE ONE YOU'RE ON will appear in the list!)

If the handset has previously worked with the base - press the hangup button and the # key at the same time on the handset for five seconds and follow the prompts to deregister the handset. (System reset - deregister HS - which handset) It will tell you that the handset is deregistered. Then put the handset onto the base and it will register the handset.

From: Uniden Customer Support

On most models you can find an option in the menu for De-register? In that case you would select that option and select to deregister the handset.
TRU88 models you go to the main menu and go to De-register HS select yes to deregister the Handset.

DCT5 and DCT6 models: Press menu on the handset. Go to System Reset and Press select. Go to Deregister HS and press select. Arrow up to yes and press select. Then go back into the menu. Go to system reset and press select. Arrow down to Replacing the base and press select. Arrow up to yes and press select.

DCT7 models: Press and hold "end" and "#" until the system reset menu appears on the display. Then follow the instructions from above for the DCT5 and DCT6 deregister procedures once your into the menu.

TRU4 and TRU5 models: Press and hold xfer/del and end until "de-register?" appears. Use the plus+ button to go up to yes and press select.

To register any of the following phones please see you owners manual under either:


•Register handset or


•Register the digital security code.

Open this link; go to the FAQ's for an MD760/MD761 and it solved my similar problem for my phone. Primarily, you will be resetting your system (almost like rebooting) and if necessary, deregister and follow with registering. I did not have to do the last part (deregister), but it does work. Good luck. http://broadband.motorola.com/consumers/support/default.asp?supportSection=CordlessPhones

I believe you have the expansion capacity of the phone all used up. The phone cannot register any more handsets until you delete the handset registered that is not in use. First check the handsets and see what handset numbers they carry. It should be #1,#2,#3,and #4 if it does not then you will have to delete the one that is missing or if it is then delete handset #5.To do this you will have to use one of the handsets registered to the base. First Press the MENU/ OK button then scroll down to ADV,SETTING then Press MENU/OK then scroll down to DEREGISTER then Press MENU/OK. Then ENTER HANDSET PIN would show, if you have not changed the pin enter 0000 if you have enter your pin member. From the next options select HANDSET and press MENU/OK from the next set of options select the handset number you want to DEREGISTER and press MENU/OK from the next option select YES then MENU/OK. Then try to reregister the new handset To do this Press the MENU/OK button then go to ADVANCE SETTING press MENU.OK scroll to REGISTER then press MENU/OK Select the base number displayed then press MENU/OK. PLEASE WAIT will appear. Then from the base press and hold the PAGE button until the handset prompts you to ENTER PIN # .Enter 0000 OR your pin number then you will see PLEASE WAIT. A tone will confirm the handset registration.

hi follow these steps and you will so great:( page 8) http://broadband.motorola.com/consumers/products/md7001/downloads/MD7001_Series_Users_Guide.pdf wont work try deregistering and then register again good luck