Alpha sender ID is supported through a shortcode via pre-registration*. If an SMS is sent with a non-registered sender ID, the SMS will be delivered with a random local virtual number or shortcode.

Long Virtual Numbers don't support alpha SID.

*You can define an intermational or domestic Alpha Sender IDs for traffic sent towards Telcel, Movistar. Two other operators: AT&T and Altan Redes will support only domestic Alpha Sender IDs.

Numeric sender IDs are not supported unless offered by Vonage's Numbers.

A local virtual number (LVN) service works for inbound/MO traffic. A dedicated LVN is assigned to an account to receive inbound traffic, and this service is available for all carriers in Mexico. For outbound/MT traffic, messages will be delivered with a pool of LVNs randomly rotating to ensure delivery. Customers must indicate the LVN in the MT message that the end user must reply to make 2-way flow feasible.

Any other numeric sender IDs will be overwritten to ensure delivery.

Marketing messages are allowed with the exceptions of adult, alcohol-related, and political content. The carrier will raise a spam complaint if they see a burst of messages with the same content, even for legitimate use case such as a notification. To avoid this it is recommended that you personalize the SMS where possible and avoid sending in batches.