Key Takeaways
- Scenario 770 is a mass vaccination or screening hall: DLR the night before decides who occupies a timed lane.
- Undelivered is an empty chair at 09:10, not a dashboard curiosity on Monday.
- Do not name the vaccine or condition in SMS. Time, site, and how to cancel.
- Portal OTP for records stays on another device. Promo “flu clinic” blasts stay off the session radio if they are marketing.
- 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 770 is a Saturday vaccine or screening hall with timed lanes. The night-before SMS is the ticket. DLR is how the floor manager knows lane C is going to sit empty. This is not a fasting draw, not after-hours urgent care, and not a routine GP reminder.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. DLR · Developer Center. GSMA.
Mass vaccine session
Hold T-18h site SMS. Map DLR to the appointment row. 07:00 floor huddle is an undelivered list, not a pie chart.
If 40 people were “sent” and 12 never delivered, you built a traffic jam at registration and empty chairs in the hall.
Session SMS vs results OTP
| Lane | Body | DLR use | Device |
|---|---|---|---|
| Session ticket | Time, site, cancel | 07:00 release/call | Hall modem |
| Record portal OTP | Digits | Auth | Dedicated |
| Product / condition | Do not SMS | — | — |
Caps: 2 / 5 / 15.
Undelivered empties a lane
One retry, then call or open walk-in. Deliverability. REST: PHP, C#. MCP wraps REST.
No product names
Logistics only. Consent for the jab lives in the chart, not in a DLR.
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.
Saturday hall
Doze exempt Friday night. Doze · Setup.
Cohort lists
Log appointment id + DLR, not full bodies. Rotate keys. Not a CodeCanyon VMS pack.
Walk-in only
If you will not act on undelivered, do not pretence-book lanes.
Checklist
- 07:00 undelivered owner.
- No product names in SMS.
- OTP on another device.
- Webhook signatures.
- Friday pairing check.
Next steps
Seed a bad number in a mock lane; prove it hits the huddle list. Downloads · Docs.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- SMS delivery reports (DLR)Delivery status tracking
- transactional SMS for orders and alertsEvent-driven messages
- SMS webhook integrationInbound and status events
- SMS API documentationLive endpoint reference
