** Disclaimer **
Only tested on a single phone (Pixel 3) without DSDS-capabilities at the moment (no dual sim dual standby support). Unexpected behavior may occur when more than one sim is active. If you experience problems, contact me through the mail provided in the app listing.
** Description **
This app helps you to switch between different (e)SIM cards and thus network providers / contracts you might have.
For example you might want to switch to one SIM to place long distance calls, but want to switch back to be reachable through your regular phone number.
Also when someone sends you a text, the message is only retained for a couple of days. If you don't log on to the network with your contract/sim the message will be discarded and never delivered. This app can then help you to switch between your (e)SIM and physical sim (or multiple eSIMs) to make sure you receive all the texts.
It also acts as a shortcut to the Android System Mobile Network List. Just place the apps icon on your launcher and save some taps to switch to another network.