SIMcountry

Per-country default SIM switching for Android, with an in-tree Shizuku-style daemon. Switches data, voice, and SMS independently when the registered cellular network changes country.

Set one default SIM, then add country overrides. When the phone registers on a Swiss network (MCC 228), SIMcountry switches data to your Swiss eSIM and leaves voice on the EU SIM. Back on an EU MCC, the defaults take over again. Physical SIMs and eSIMs are equal citizens; inactive eSIM profiles can be activated as part of the switch.

Highlights Per-aspect control. Switch data, voice, and SMS independently or together. Physical SIMs and eSIMs. Including eSIM profiles that are currently inactive (where the device allows it). No third-party app required. The privileged daemon ships inside the same APK and binds over a Binder handover. Country picker. Searchable list of every ISO 3166-1 country with its E.212 MCCs. Specificity-aware matching. Optional MCC and MNC narrowing within a country; the most specific rule wins. Hysteresis built in. Debounce, reverse hysteresis, minimum switch interval, and per-MCC suppression after a manual override. No external runtime dependency. No Shizuku, no root, no Magisk. Wireless-ADB autostart. One-time pairing with the six-digit code from Developer options; the daemon then comes back on every boot without a PC.

License

BSD 2-Clause "Simplified" License