https://community.bt.com/t5/BT-Devices/BTz4600-Big-Button/m-p/2242144#M27811 <P>De-register the new handsets from the base unit &amp; re-register to the existing one. Pages 78/9;</P><P><A href="https://shop.bt.com/content/uni2/documentation/by4k/3653_bt4600_ug_call_blocking_version_iss.4_[3].pdf" target="_blank">https://shop.bt.com/content/uni2/documentation/by4k/3653_bt4600_ug_call_blocking_version_iss.4_[3].pdf</A></P> Fri, 22 Jul 2022 05:37:46 GMT Anonymous 2022-07-22T05:37:46Z https://community.bt.com/t5/BT-Devices/BTz4600-Big-Button/m-p/2242143#M27810 <P>Can you sync a new set of Bt 4600 big button &nbsp;phones to the same set of old phones please and how&nbsp;</P> Fri, 22 Jul 2022 02:27:39 GMT https://community.bt.com/t5/BT-Devices/BTz4600-Big-Button/m-p/2242143#M27810 Malcolmsharp 2022-07-22T02:27:39Z https://community.bt.com/t5/BT-Devices/BTz4600-Big-Button/m-p/2242144#M27811 <P>De-register the new handsets from the base unit &amp; re-register to the existing one. Pages 78/9;</P><P><A href="https://shop.bt.com/content/uni2/documentation/by4k/3653_bt4600_ug_call_blocking_version_iss.4_[3].pdf" target="_blank">https://shop.bt.com/content/uni2/documentation/by4k/3653_bt4600_ug_call_blocking_version_iss.4_[3].pdf</A></P> Fri, 22 Jul 2022 05:37:46 GMT https://community.bt.com/t5/BT-Devices/BTz4600-Big-Button/m-p/2242144#M27811 Anonymous 2022-07-22T05:37:46Z