Unsatisfactory GPS reception on PinePhone?

[LinAdmin2]

When looking at the results of GPS reception by typing in the console

Code:

mmcli -m 0 --location-enable-gps-nmea # Once only
mmcli -m 0 --location-get             # Many times

I get a maximum of 3 satellites even when absolutely no obstacle present and no clouds at the sky.
This command does not report any fix even after 30 minutes trial.

Is this the adequate method and what are your experiences?