When you connect directly to a carrier you get so called PTT codes back (industry standard). Not all carriers do this the same way but we standardize this and r

When you connect directly to a carrier you get so called PTT codes back (industry standard). Not all carriers do this the same way but we standardize this and return them like shown at the link below. When your provider uses a lot of in-between providers its harder to return errors correctly. https://developers.messagebird.com/docs/smserrorcodes https://developers.messagebird.com/docs/smserrorcodes