Key Takeaways
- An android sms gateway api checklist is a go/no-go gate list: secrets, pairing, airtime, canaries — not a marketing brochure.
- Separate API readiness from radio readiness so on-call knows which layer failed.
- HTTP accept is not delivery; wire DLR or application confirms before promising OTP SLAs.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free is 300 SMS lifetime; Developer is 25,000 SMS per year.
- Isolate OTP from marketing device pools before launch.
- Canary on staff numbers; keep a written rollback path.
Summary
Teams searching android sms gateway api checklist need a pre-launch gate list before customer OTP hits a paired handset. This page covers API secrets, radio readiness, idempotency, and canaries — translated for Android SIM fleets, not aggregator number pools. Priced by devices and SMS send volume. You use your own phone and operator SMS credit.
Related: OTP and 2FA SMS on Android, Twilio vs Android SMS gateway, device setup guide, SMS API documentation.
If the only green light you checked is “API key works in Postman,” you launched an HTTP client — not a gateway. The radio still has to send, and the operator still has to deliver.
Why an API pre-launch checklist
Aggregator checklists assume cloud numbers and per-message ledgers. Handset gateways add pairing, OEM exemptions, and prepaid balance. Translate every “dashboard green” item into both control-plane and radio checks.
Go / no-go gate table
| Gate | Pass | Fail | Owner |
|---|---|---|---|
| Secrets | Keys in env; rotated; least privilege | Keys in tickets or mobile screenshots | Backend |
| API contract | Live fields match Developer Center | Copied stale blog payloads | Backend |
| Radio | Paired, charged, funded SIM, exemptions | Stale last-seen, zero airtime | Device ops |
| Idempotency | OTP retries do not double-send | Blind retry storms | Backend |
| Canary | Staff DLR inside envelope | First send is a customer login | On-call |
Auth and secrets
Store API keys in environment variables or a secret manager. Never embed them in mobile apps or public repos. Prefer server-side sends only. Rotate keys when staff leave. Confirm current auth headers in the SMS API documentation.
Radio readiness beside the API
- Install from Downloads and pair via Setup.
- Battery exemptions and OEM background rules documented per model.
- SIM funded; dual-SIM OTP slot labeled.
- Spare handset charged before customer traffic.
Idempotency, retries, DLR
Persist message IDs. Retry transport failures with backoff; do not blindly retry permanent rejects. Treat HTTP success as accepted, not delivered. Alert on Pending age and device last-seen, not only 5xx rates.
Cost gates
Budget platform send volume and operator airtime separately. Free is 300 SMS lifetime; Developer is 25,000 SMS per year. Launch retries still burn prepaid — include them. Keep marketing off the OTP SIM.
Canary before customers
Ten messages to staff numbers you control, wait for DLR (or honest timeout), then open the login path. If the canary would bar a SIM, it is not a canary.
Full checklist
- Secrets, contract, radio, idempotency, canary, rollback owned by named people.
- OTP isolated from promo.
- Airtime + platform volume budgeted including retries.
- No unmetered-carrier claims in launch titles or H1s.
Next steps
Confirm fields in the SMS API documentation, compare pricing, and complete setup.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- SMS API documentationLive endpoint reference
- device and SMS volume pricingPlans and allowances
- Android SMS gateway product guideDefinition, product, and how to buy
- download the Android gateway appGet the APK
