Thank you for the clarification about the Camera related apps.
I installed the Oneplus Gallery, Oneplus Camera and GCAM. Oneplus Camera looks slow compared to the one on the Stock ROM. The screen format change does not work (only 4:3 remains). Using this one : com.oneplus.camera_3.0.16-23170661_minAPI26(arm64-v8a)(nodpi)_apkmirror.com.apk
I downloaded what seem to be the Google Dialer (com.qualcomm.qti.confdialer_9-28_minAPI28(nodpi)_apkmirror.com.apk) found here https://www.apkmirror.com/apk/googl...-9-release/confdialer-9-android-apk-download/
It won't install (did not see a particular error, and did not look in logcat)
Edit : I added "3179" as a contact, and was able to call (dual sim selector asked me which SIM to use and it worked). Trying to dial it from dialer did show the Sim chooser popup (not the dual sim selector one) and the phone did hang&reboot
Maybe the issue is due to a setting in privacy guard but I can't find which one.
I agree, the OnePlus Camera doesn't perform well on this ROM. GCam performs much better.
I don't know what that file is that you listed, but I see it listed on the old dialer page.
You're looking for "Google Phone".