| Mistake | Result | Fix |
|---|---|---|
| Assigning Wallet but only enabling SMS | Works, but wallet adds complexity without benefit unless using MCC MNC | Use Credit for SMS-only outside India systems |
| Assigning Credit but user needs WhatsApp/RCS | Other products cannot be enabled | Switch to Wallet |
| Switching credit type without clearing balance | Save rejected | Tick Nil existing balance first |
| Post-paid user with no limits set | Unexpected blocking or unlimited usage | Set Credit/Grace limits correctly |
| Transferring credits to a Wallet user as “credits” | Wrong ledger / wrong balance bucket | Transfer in wallet currency amount |
| Child user under parent with different credit type | Transfer or billing issues | Align parent chain credit types |
