Confirm the device and carrier
Review Android compatibility, permissions, SIM conditions, connectivity, and expected message volume with the product team.
Keep credentials on the server
Obtain the authorized API contract and credentials. Browser code must not contain secret gateway tokens or recipient lists.
Define failure handling
Agree on message references, retry behavior, duplicate protection, and the distinction between processing and confirmed delivery. Do not infer delivery from a successful API call alone.
Test with authorized recipients
Use approved test numbers and harmless messages. Confirm the supported monitoring and reporting behavior before business use.