Key Takeaways
- Scenario 1960 is a field-trip last-call at 06:50: the trips SIM dies under the parent spike — a spare already paired takes the rest. Not laptop-loan, snow-day, or late-bus.
- Families who get silence will clog the coach bay. The product is the second radio.
- Do not SMS student names or medical notes in message 1. Gate, depart time, and a short PIN if you must.
- Staff portal OTP stays on another device.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free: 1 device / 300 SMS lifetime / 300 contacts. Developer: 25,000 SMS per year.
Android SMS gateway scenario 1960 is a coach-bay desk. Parents get “depart 07:15, south gate.” The trips SIM cooks at 06:50. A spare already hot takes the rest. Library loans and breakfast sites are the wrong list.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Multi-device · Developer Center. GSMA.
Field trip, not a loan
Pair the spare the night before. 06:52 is a failover, not a firmware update.
If 80 parents were queued and one radio died, the coach left with a half-informed list.
Last-call vs LMS
| Lane | Body | Failover | Device |
|---|---|---|---|
| Depart / gate | Time, gate | Spare at 06:50 | Trips + spare |
| Staff LMS OTP | Digits | Never share | Dedicated |
| Medical notes | Do not SMS | — | — |
Caps: 2 / 5 / 15.
Spare already paired
Mid-blast pairing fails. Load balance. REST: PHP, C#. MCP wraps REST.
No student names
Gate and time only. Confirm identity on inbound STOP.
Devices and airtime
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free: 300 lifetime. Developer: 25,000 SMS per year. Pricing.
06:50 blast
Doze exempt before dawn. Doze · Setup.
Trip SIMs
Log trip id + device, not names in chat. Rotate keys. Not a CodeCanyon coach pack.
Two SIMs or a queue
If you will not keep a hot spare, do not promise 06:50 last-call SMS.
Checklist
- Spare paired night before.
- No names in templates.
- OTP on another device.
- Webhook signatures.
- Both handsets charged at 06:00.
Next steps
Kill the trips SIM on a canary list; prove the spare finishes before 07:10. Downloads · Docs.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- multi-device and dual SIM routingCapacity and failover
- OTP and 2FA SMS on AndroidAuthentication flows
- SMS delivery reports (DLR)Delivery status tracking
- SMS API documentationLive endpoint reference




