A. 1. Ensure you are entering the phone number in the correct format: Include the country code and omit any leading zeros. For example, for a US number, enter it as +1XXXXXXXXXX. 2. Check for app updates: Make sure you are using the latest version of VK, as updates may include fixes for number format issues.

B. 3. Clear the app cache: Go to Settings > Apps > VK > Storage > Clear Cache. This can help eliminate any temporary issues related to number formatting.