How-to Workflow (2)

Your SMS program worked in testing. It worked for the first campaign. Then, somewhere between your platform's dashboard and your customers' phones, a growing share of messages started disappearing. No error. No bounce. Your dashboard says sent. Your customers say nothing arrived. If you are messaging into Nigeria, this is not a bug. It is the predictable result of a regulatory system that most teams only learn about after it has already cost them.

Tanzania has 90 million mobile subscriptions and one of the highest mobile money transaction rates in Sub-Saharan Africa. It is also a market where the Tanzania Communications Regulatory Authority has been tightening its grip on commercial SMS traffic since 2023, where every alphanumeric sender ID generally needs to be registered with the relevant mobile network operators before a single message is sent, and where a 2022 data protection law with active enforcement adds a second compliance layer that most operators building SMS programs have not fully accounted for.

Most teams designing SMS programs for Rwanda discover the two-way limitation after the program is already built. The workflow assumes recipients can reply to confirm, opt out, or respond to a survey. The sender ID is registered, the consent records are in order, and the first broadcast goes out. Then nothing comes back, because standard A2P SMS routes used by most providers do not support inbound replies on MTN Rwanda and Airtel Rwanda.

Your SMS program is reaching Safaricom numbers. Except the ones that silently dropped. And the campaign you sent after 6 PM that delivered to no one. And the branded sender name you configured that only works on transactional messages, not promotional ones, something your provider may not have mentioned when you set it up.

Most teams building SMS programs in Ghana discover the Sunday restriction after their first failed Sunday campaign. The setup seemed correct. The sender ID was registered. The contact list was clean. The messages were sent. And then the delivery reports came back empty, because promotional SMS cannot be sent on Sundays in Ghana, and it cannot be sent before 8 AM or after 7 PM on any day of the week.