https://devzone.nordicsemi.com/f/nordic-q-a/48442/what-is-the-purpose-of-coex-pin-in-nrf9160-lte-moduleHello All, We are designing a product based on Tracking device, for this we use nRF9160 module &amp; use controller #nRF52840 to send AT command for LTE and GPS. We do not use Bluetooth connectivity function of nRF52840 controller. We do not familiaren-USTelligent Community 13Sat, 15 Jun 2019 06:40:44 GMThttps://devzone.nordicsemi.com/thread/193000?ContentTypeID=1Sat, 15 Jun 2019 06:40:44 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5ddfa041-9be8-4ed0-a4b8-f639e46ef78cShashikant<p>Thanks Jared for your helpful answer</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/192408?ContentTypeID=1Wed, 12 Jun 2019 13:33:35 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2e260a14-b6b1-4a05-8416-126586944118Jared<p>Hi,</p> <p>Yes the purpose of the COEX interface is to indicate to an external RF device that the LTE modem is on. You can read more about it <a href="https://infocenter.nordicsemi.com/topic/ps_nrf9160/dita/chapters/radio_lte/gnss_coext_if.html?cp=2_0_0_6_2">here</a>. No you don&#39;t have to connected it to anything if you don&#39;t use an external device.</p> <p>Regards</p> <p>Jared</p><div style="clear:both;"></div>