The numbers’ portability assures users they’ll keep their phone number even if they change their operator. In France, the procedure is mandatory and very simple since November 2012: the transfer of a number between two operators must be carried out in 3 days in mainland France!
When you send your campaigns to your clients, their number goes through a database that redirects it to the operator they are attached to. The operator then sends your message to your recipients – that also are its clients.
If there is a transfer between operators, the database is updated: a number which was previously attached to an operator X becomes attached to an operator Y. Therefore, whatever the operator, when you send your campaigns your message always reaches its destination.
However, this update sometimes takes a few more days than the portability itself. If you send a campaign between the number’s portability and the database’s update, the database will send your message to the wrong operator. The operator won’t be able to send your message as your client will no longer be its client. Therefore, it will communicate to our platform that the number is invalid. You won’t be able to know whether the number is really invalid or if it’s a transferred number.
That is why we advise you not to delete your invalid numbers after each sending. You should delete them if they are notified as invalid two campaigns in a row: this way, you will be sure that a number is really invalid and is not just a transferred number.