Reddit mentions of Rode SC7 3.5mm TRS to TRRS Patch Cable

Have you tried a different TRRS cable?

Was going to suggest you look for a shielded TRRS cable, but they don't seem to exist. This one from Rode gets good reviews, but it's a TRS to TRRS. Don't know if that's what you need.

https://www.amazon.com/Rode-SC7-3-5mm-Patch-Cable/dp/B00L6C8T22

If a new cable doesn't work, your best bet would likely be a new mic. Picked up this one for $40 recently and it's surprisingly good.
https://www.youtube.com/watch?v=66NnW4SNtmo

I don't know what the best microphone for the 2XL is but I have been using this microphone with my DSLR and thought I'd try with my 2XL: https://www.amazon.com/gp/product/B015R0IQGW

This cable works with my 2XL / dongle: https://www.amazon.com/gp/product/B00L6C8T22

Just got the new Google camera a few days ago so haven't been able to play with it a lot. it works. Sound quality is very good but the audio level is very low making it basically unusable. Haven't found a way to turn up the mic gain.

Ok.
So, I bought the Rode 2nd hand and I received 2 cables.

Microphone to a Smartphone (TRS to TTRS) https://www.amazon.com/Rode-SC7-3-5mm-Patch-Cable/dp/B00L6C8T22

Microphone to a DSLR (TRS to TRS I believe)
When you plug the TRS to TTRS, you can chose the external mic from the camera application (screenshot attached).


So with a direct cable is the easiest way possible. Plug the mic, go to the app, choose it. (keep in mind that if you exit the app, you need to select it again after reopen it) - anoooyiiiing.

Soo, Mic is working but I can't hear anything when I call someone because the OnePlus think there is an headset connected. But I can record a video with external Mic.

I have this https://www.amazon.de/dp/B015R0IQGW/ref=cm_sw_r_cp_apa_i_UDGODbZ07NB92 and this https://www.amazon.de/dp/B00L6C8T22/ref=cm_sw_r_cp_apa_i_UCGODb7YS5VMQ

I'm no expert, but I think you need one of these type of things - https://www.amazon.ca/dp/B00L6C8T22/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=3UJBBU7HXZBO4&coliid=I1O65JWNRJI7RP&psc=1

You would need an adapter. If you look at the headphone jack of headphones and compare that to the jack of headphones with an inline mic, you'll notice there is an extra connection (they're divided by the black lines). The extra one is for mic input. Without this, your phone won't know a mic is even connected.

An example adapter cable is this Rode one here - This is meant to work with one of Rode's microphones, but I don't see why it won't work with other things it can connect to, as long as it's not wired a special way.