- Makes sure your device supports Google services.

- Check the version of the Google Play Store app installed on your device. If the app hasn't been updated to the latest version, it may not support current payment processing methods.

- You are in a country where this service is unavailable. Google Play Billing may be restricted in certain regions.

(Please check the list of available countries in Google services)

(Check which countries and regions are supported by Google)

- Make sure your device is Google Play Protect certified. Open the Google Play app. In the upper right corner of the screen, tap the profile icon, then tap "Settings," "About the App," and "Resolve Problem."

- If the problem persists, check Google Play Services. Open the Settings app. Select your profile, then tap "All Services." In the "Privacy and Security" section, tap "System Services," "Google Play Services," and "Download/Update."

- We also recommend checking for system updates and installing them on your device. OS and security updates will usually help to resolve incompatibility issues on your device.

- Check for Google Carrier Services updates.

(How to troubleshoot Play Protect certification status)

Make sure that:

- your bootloader isn't unlocked;

- you aren't using a modified version of Android OS;

- root access is not enabled on your device.

- The user is a corporate user, and the company's admin has blocked purchases. On corporate accounts, settings may restrict users from making purchases.

- Issues with the user's payment method. For example, their credit card may be expired, their bank may have blocked transactions, or other payment processing issues may have arisen.

- Invalid Google account settings. If the user has not logged into their account or if their account is blocked, this could lead to an error.

- Google Play Billing is down. Temporary issues with Google services could also cause this error.

- Restrictions linked to account type. For example, some restrictions may apply to accounts that use certain payment methods or are in certain jurisdictions.

INTERNET CONNECTION ISSUES:

- Unstable Wi-Fi/mobile internet access.

- High latency (ping) or loss of packets.

- Queries to Google services are blocked (due to a corporate proxy, VPN, or firewall, for example).

(Check for speed & latency in your connection)

TEMPORARY GOOGLE SERVICES MALFUNCTION ON THE DEVICE:

- Google Play Services has crashed.

- Issues authenticating Google account (requires the user to log in again).

- Play Services cache/data errors.

(How to fix problems with Google Play services)

DEVICE RESTRICTIONS:

- Low battery (some devices restrict online operations in this case).

- Power-saving mode is blocking background queries.

- Play Services does not have the necessary permissions (like network access).

INVALID DEVICE CONFIGURATION:

- Outdated version of Google Play Services.

- API incompatibility with Android version.

COMPANY NETWORK POLICES:

- Some corporate networks may restrict calls to external API.

- In this case, the user will have to use a specific DNS or proxy.