Key Takeaways
- Scenario 890 is after-hours urgent care: reminders fire overnight, the desk acts on undelivered DLR at 06:30.
- Do not SMS symptoms or “bring your warfarin.” Time and cancel path only.
- Night Doze on the reminder phone makes every DLR look queued. Exempt and charge the modem.
- Portal OTP stays on a dedicated device. Flu-clinic promo never shares it.
- 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 890 is an urgent-care desk that books midnight-to-dawn slots and texts holds while the building is dark. The product is the 06:30 undelivered list, not a pretty send graph. Day-clinic DLR playbooks miss the overnight radio: Doze, prepaid death, and nobody watching webhooks.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. DLR guide · Developer Center. GSMA.
Urgent-care night book
Holds go out when the patient books at 01:10. DLR may land at 01:12 or never. The opening nurse needs a filtered list, not a raw webhook dump. Map states to desk words: queued, sent, delivered, undelivered, expired.
If the only 06:30 artifact is “98% delivered,” you hid the two slots that will sit empty — and those were the ones the radio never reached.
Walk-in hold vs portal OTP
| Lane | Body | DLR use | Device |
|---|---|---|---|
| Night hold / reminder | Time, door code policy, cancel | 06:30 callback | Night modem |
| Patient-app OTP | Digits + expiry | Auth metrics | Dedicated |
| Campaign (vaccine) | Consented promo | STOP watch | Other MSISDN |
Device caps: Starter 2, Professional 5, Business 15.
06:30 list after night DLR
Do not retry undelivered in a 90-second loop overnight — you burn airtime and still miss the slot. One scheduled retry window, then a human call. Deliverability.
Symptom text is still PHI
“Chest pain slot confirmed” is too much. Keep logistics. Results stay in the portal. This is ops, not legal advice.
Write-back before doors
Verify signatures before flipping appointment SMS state. Idempotent on message id. REST samples: PHP, C#. MCP wraps REST. Webhooks.
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. Paid tiers uncap platform volume; night retries still bill the SIM. Pricing.
Night modem
Doze exempt, charger, locked user — not the on-call doctor’s daily driver. Doze · Setup.
Keys and retention
Prefer appointment id + template id + DLR state in logs. Rotate keys. Not a CodeCanyon clinic pack.
Voice-first after-hours
If you will not staff 06:30, do not promise SMS holds. CPaaS if you refuse device ops. vs aggregator.
Checklist
- 06:30 undelivered owner named.
- Night modem Doze-exempt and charging.
- OTP on a separate device.
- No symptom language in templates.
- Webhook signatures verified.
- Airtime owner for the night SIM.
Next steps
Book a staff 02:00 slot, force a bad number, prove it appears on the 06:30 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
