Key Takeaways
- Scenario 306 is Saturday open-house RSVP and the 08:45 address drop — not weekday listing clocks, lettings, key day, rent ledger, or HOA levy.
- Portal OTP for “confirm I am coming” stays off the address-drop SIM.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free is 300 SMS lifetime, 1 device. Developer is 25,000 SMS per year.
- Starter is 2 devices; the Saturday spare still counts.
- A Friday-night cancel must kill the Saturday 08:45 street address.
- New-build flyers wait until the last 10:00 slot is seated.
Summary
Scenario 306 is the Saturday open-house clock: RSVP and cancel texts through Friday night, then one address drop at 08:45 to people still coming. Service pricing is based on device count and total SMS sent through the gateway. You need a working Android phone with a SIM and SMS credit from your mobile operator. Operator message costs are yours—we do not sell carrier SMS balance.
If the street address leaves at 08:45 to Friday’s full list, you did not schedule viewings. You leaked a vacant house to people who already said they would not show.
Not a CodeCanyon “estate agent SMS” pack. Device meters apply — Twilio vs Android SMS gateway.
Key takeaways
- Scenario 306 is Saturday open-house RSVP and the 08:45 address drop — not weekday listing clocks, lettings, key day, rent ledger, or HOA levy.
- Portal OTP for “confirm I am coming” stays off the address-drop SIM.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free is 300 SMS lifetime, 1 device. Developer is 25,000 SMS per year.
- Starter is 2 devices; the Saturday spare still counts.
- A Friday-night cancel must kill the Saturday 08:45 street address.
- New-build flyers wait until the last 10:00 slot is seated.
Related reading
real estate SMS, scheduled SMS, how an Android SMS gateway works, ICO direct marketing.
Context
Branch phones die on Friday. Agents still confirm Saturday 10:00–13:00 walk-throughs after dinner. The address must not travel with the brochure. One radio in a locked office loses the weekend.
Free (300 SMS lifetime) is a rehearsal branch. Developer is 25,000 SMS per year.
Core scenario guidance
Freeze the confirmed list at 08:30. The 08:45 job reads that snapshot, not Friday’s RSVP dump.
Hold new-build flyers until the last 10:00 slot is seated. Timezone is the listing’s city, not HQ UTC.
Open-house roles
| Role | When | Typical fail |
|---|---|---|
| RSVP / cancel confirm | Fri 12:00–Sat 08:00 local | Queued behind a new-build flyer |
| 08:45 address drop | Confirmed attendees only | Sends to Friday cancellations |
| Portal OTP | Transactional, own pool | Dumped onto the address SIM |
| Brochure / new-build | Held until last slot seated | Released at 08:00 into RSVP |
Cost and ownership
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. A Saturday spare is a billed device. Resends burn airtime.
Name a Friday 17:00–Saturday 14:00 on-call, not only weekday listing hours.
Operations
Friday 17:00 canary both radios. After OEM updates, re-pair before the first Saturday drop.
Abort: hold brochure, keep RSVP/OTP, skip address if the freeze file is stale. Do not “resend all RSVPs.”
Security and compliance
Street addresses are location data. Short bodies. No lockbox codes in SMS. Authenticate CRM cancel hooks.
Brochure and new-build are promotional. RSVP confirm is still marketing-adjacent — honour STOP.
Decision guide
Ship when Friday canary is green and the 08:30 freeze is owned. Delay if phones live in a closet that locks Friday. If handsets are forbidden on site, CPaaS for portal OTP.
Checklist
- Primary + Saturday spare paired.
- Friday 17:00 canary.
- 08:30 confirmed freeze.
- Cancel kills 08:45 address.
- Brochure held.
- Airtime before Friday close.
- Battery exemptions both OEMs.
- Listing-city locale.
- Weekend on-call named.
- Device cap includes spare.
Next steps
Review device and SMS volume pricing, device setup, SMS API documentation.
Deep dive: production hardening
Cleaners pulling USB Friday 16:30 is an outage. Label one brick per radio.
Dual-SIM remap after patches. Address drop stays on the documented slot.
No auto-reply on OTP numbers. Watch DLR, not CRM 200s.
Deep dive: scaling and failure modes
Multi-branch Saturdays add devices before inventing a hidden unlimited-handset SKU.
Two cities, two 08:45s. One UTC cron leaks the wrong street.
Raise OEM ceilings; fair-use remains. Not unlimited carrier SMS.
Deep dive: integration discipline
Idempotency on listing_id + saturday_date + kind (rsvp|address).
If an agent books viewings, MCP is a REST wrapper — live fields in Developer Center.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit.
Friday 17:00 RSVP freeze
Canary both radios. Confirm a staff cancel removes that row from the Saturday 08:45 file.
Hold a dummy brochure; confirm it does not transmit at 08:00.
Abort: skip address, keep RSVP, page if both radios dark.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- scheduled SMS campaignsSend later windows
- transactional SMS for orders and alertsEvent-driven messages
- SMS auto-reply and STOP keywordsOpt-out and keywords
- SMS API documentationLive endpoint reference
