International deployment (systemClientType > 1)?
├── Yes → Use WALLET
│         Enable MCC MNC Routing on SMS Attributes
│         Configure routes on Users → MCC MNC Routing
│         Set wallet currency (USD, EUR, etc.)
└── No (India domestic)
          → CREDIT is fine
          Use Assign Route (no MCC/MNC map needed)
          DLT / template rules apply