A. 1. Verify your phone number: Ensure that the phone number linked to your BaridiMob account is correct and active. You can do this by checking your account settings within the app. 2. Check your SMS settings: Make sure that your device can send and receive SMS messages. You can test this by sending a text message to another number.

B. 3. Wait and retry: If the SMS server is down, it may be a temporary issue. Wait for a while and try again later.