https://devzone.nordicsemi.com/f/nordic-q-a/53396/bletooth-5-communicationHi , I am under starting about bluetooth For bluetooth 5 is support 1M, 2M and LE coded PHY If I have devices as below 1. Bluetooth device side0 ( support 1M, 2M and LE coded PHY ) &lt;------------Communication-------------&gt; Mobile side1 ( supporten-USTelligent Community 13Tue, 22 Oct 2019 11:21:57 GMThttps://devzone.nordicsemi.com/thread/216130?ContentTypeID=1Tue, 22 Oct 2019 11:21:57 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5f91c02d-c901-4e85-9698-c45762474d3eJoakim Jakobsen<p>Hi.&nbsp;</p> <p>Q1:&nbsp;</p> <p>Yes, If your device supports 1M, 2M and Coded Phy, your device will be able to communicate with all the mobile devices.&nbsp;</p> <p>Q2:&nbsp;</p> <p>The default PHY is the same as the PHY you use to advertise with. In other words, the central will send the connection request with the same PHY used for the connectable advertisement packet. If the central support 2M PHY, it may choose to request a PHY change after the connection has been established, which will be accepted if you reply with AUTO.</p> <div>Please see this ticket for more information:&nbsp;<br /><a href="https://devzone.nordicsemi.com/f/nordic-q-a/44169/default-phy/">https://devzone.nordicsemi.com/f/nordic-q-a/44169/default-phy/</a>&nbsp;</div> <div></div> <div>Best regards,&nbsp;<br />Joakim Jakobsen</div><div style="clear:both;"></div>