If de-register process does not work you may need to reset the system and try again.. To reset: pick up the handset and press

.. Press the OFF button and place the handset back into the telephone base or charge..

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Registration

If you are replacing a handset on a system that has the maximum number of registered handsets or wish to change the assigned handset number of your registered handsets, you must first de-register the handsets, then re-register all handsets..

To de-register all handsets

1.Press and hold INT/FIND HANDSET on the main telephone base for 10 seconds..

2.When the IN USE light starts to flash, release the INT/FIND HANDSET button..

3.Press and release INT/FIND HANDSET again.. The IN USE light will turn off and in a few seconds, all handsets will be de-registered..

4.. All handsets will show NOT REGISTERED..

NOT REGISTERED

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VTech mi6897, mi6877 user manual To de-register all handsets