Reliability
Long SMS and carrier charges
Implementation scenario · This is an example implementation, not a story about a named customer. Results depend on your integration, phone, network and carrier.
AI-generated scenario illustrationThe problem
Service quota counts messages, but a carrier can bill long text as multiple segments. Characters used also affect segmentation.
Build the solution
Keep notifications short: order reference, event and contact. Put details in your CRM or a verified web page. Before launch, assess actual text and SIM-plan terms rather than just API-call counts.
Check before launch
Test Cyrillic, Hebrew, Arabic and emoji on your phone. Do not assume one API job equals one carrier-billed segment.
How SIM Bridge works
Your backend creates a job through the API, and the connected Android sends SMS through your SIM. Store the message ID in your system and receive status changes through a webhook. A queued job is not yet a sent message: the phone must be available and the carrier must accept it.
Start with your own test number. Check Android permissions, screen-off connectivity, retries with the same Idempotency-Key, and unknown-status handling. Keep API keys out of browser code and public repositories.
