What does the MSG-057 Error mean?
If a message you sent is not delivered to the end device and returns a MSG-057 error code, this indicates that you have hit your current daily messaging limit for your 10DLC brand with T-Mobile.
When Sakari registers your 10DLC Brand and Campaign with the Campaign Registry your business receives a score which corresponds with a daily messaging limit. Based on your supplied Brand information each carrier applies daily messaging limits, usually T-Mobile is the lightest of them all.
What can I do to raise my messaging limit?
We can apply your brand for additional vetting. There is a one-time $40 USD fee to do this. This does not guarantee a raise in your daily messaging limit.
Please contact the Sakari support team to have your additional vetting applied to your brand by emailing email@example.com