We are doing our best to ensure that downtime is kept to the absolute minimum.
The maintenance window for the AWS migration is scheduled for 22 April 2018 from 07:00 – 09:00 (GMT+2). There will be a downtime period during the maintenance window when the SMS service will be unavailable for all Developers Central and Communicator accounts. You will not be able to log in to your account and our APIs will not be available to send messages. Please endeavor to schedule your messages outside of the maintenance window for smooth message delivery.
Incoming messages on two-way numbers will be queued by the network operators and will be processed once the maintenance window is complete.