Can you make reliable calls yet?

[alaraajavamma]

First things first:

Pinephone is quite easy device to test and tinker things because if you mess up something you can just flash fresh image to it.

It is nearly impossible to brick it. So if there are lot of things broken I suggest just to flash new image to PP
And regarding to flashing I suggest to take a look this Tow-Boot



If Nano is not working for try vim. It will work.

This quote is from here

Frequent disconnects and reconnects (Modem vanishes and reappears a few seconds later during operation or after waking up from suspend)

Sometimes the kernel is too aggressive trying to suspend the USB port when it's actually in use. Disabling runtime suspend for the port usually helps a lot.

Edit /usr/lib/udev/rules.d/80-modem-eg25.rules
    Look at the first line where it says ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ENV{DEVTYPE}=="usb_device", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/control}="auto"
    And change it to ON ACTION=="add", SUBSYSTEM=="usb", DRIVERS=="usb", ENV{DEVTYPE}=="usb_device", ATTRS{idVendor}=="2c7c", ATTRS{idProduct}=="0125", ATTR{power/control}="on"

It is officially meant for that Biktorgjs nearly FOSS modem firmware but it will help also with the stock modem firmware.
If you choose to try Biktorgjs modem firmware please make your homework before flashing it - most likely it will works better than stock firmware but there are so many variables with different carriers.

If mobile broadband is not working please check your APN settings because some of them you have to set up manually.

Edit. And I am quite sure that with Manjaro Plasma Mobile all basic functions should work out of the box - so did they work at the beginning?
Pinephone is developing so fast that even few months ago written instructions or experiences might be totally different today - but hey that is only good thing . Many times you just have to dig deeper when you found some instruction or issue etc.