You need to set which SIM to use by default.
Settings -> Network & internet -> SIMs
Go into the one you wanna use by default and set the Calls preference (and probably SMS preference too)
A community for GrapheneOS related questions and discussion.
You need to set which SIM to use by default.
Settings -> Network & internet -> SIMs
Go into the one you wanna use by default and set the Calls preference (and probably SMS preference too)