SimSwitch

SimSwitch is a simple and practical tool for switching mobile data between two SIM cards.

It lets you quickly switch between your mainland and external SIM cards, and provides a floating window so you can change the active data SIM without repeatedly opening system settings.

Key features:

Quickly switch mobile data between two SIM cards

Support SIM slot mapping for mainland and external SIM cards

Check SIM, default data subscription, and Wi-Fi status

Floating window for quick switching

Shizuku-based authorization

Step-by-step setup guide for first-time users

Chinese and English interface

Optional links to RTK Survey and GIS platform services

How to use:

Grant overlay permission

Install and start Shizuku

Complete Pairing and Start in Shizuku

Grant SimSwitch Shizuku permission

Check the current SIM and Wi-Fi status

Start the floating window and switch mobile data quickly

Important notes:

SimSwitch requires Shizuku to perform system-level operations.

SIM and default data behavior may vary by device manufacturer and Android version.

Make sure both SIM cards are installed and available before switching.

SimSwitch does not modify APN, carrier plans, or operator settings.

Overlay permission is required for the floating window feature.