Investigate and configure alternatives to Google servers used by default
Some Google servers are used by default in AOSP
From the top of my head:
- DNS: 8.8.8.8, 8.8.4.4
- Connectivity check: gstatic.com (used for checking if there's internet access / if a wifi hotspot needs login I believe)
We can boot up a fresh install, make sure to disable microg, and then see what the device tries connecting to.
Also, can use this to remove some other irrelevant Google references too, like Torsten noticed in Settings -> Backup