Error Message when submitting Campaign in CM:
The Campaign "Name" to be sent at " Date and Time" has failed: The mobile number submitted is invalid, sent to "number of contacts".
1. Open your contacts and check all numbers have been entered in correct international format.
2. Make sure there is no item with any text entered in mobile number field.
The easiest way to check your contacts is:
Open your contacts and click once/twice to mobile number column, this will reorder your numbers and will show you any incorrect number or text at the top.
Any incorrect number will cause the campaign to fail.