Bulgaria +359
- Pre-registration of alpha tags is required.
- Unregistered alpha tags will be overwritten with generic alpha tags.
- Numeric long codes and short codes will be rejected.
- Both one-way and two-way messaging is allowed.
- Two-way messaging can been done with a dedicated long code and is only for domestic brands. International brands can't send two-way messaging.
- Both transactional and promotional content is allowed, and requires pre-registration.