To install and use Google Pay on your Redmi Turbo 4 Pro with a China ROM, you may encounter some limitations due to the ROM's restrictions on Google services. However, you can try the following steps to see if you can get Google Pay to work:
1. Install Google Play Store: If your device doesn't have Google Play Store installed, you'll need to sideload it. You can download the Google Play Store APK from a trusted source and install it on your device.
2. Add Google Account: After installing Google Play Store, add your Google account to the device. This will enable you to download and use Google Pay.
3. Download Google Pay: Open Google Play Store, search for Google Pay, and install the app on your device.
4. Set up Google Pay: Open the Google Pay app, follow the on-screen instructions to set it up, and add your payment methods.
5. Enable NFC: Ensure that NFC is enabled on your device as Google Pay uses NFC for contactless payments.
6. Check Compatibility: Keep in mind that some China ROMs may not be fully compatible with Google Pay due to system modifications and restrictions. In this case, you may need to consider alternative payment methods for your trip to Europe.
If you encounter any issues during the process, feel free to ask for further assistance. Safe travels!