Key Takeaways
- Scenario 966 is annual boiler-service T-7 access SMS — not listings, lettings, key day, rent, HOA, open house, auction, exchange, gas-safety T-14, valuation, inventory, EPC, keys 17:00, void frost, meter-read T-2, or evening viewing.
- Portal OTP stays off the boiler 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 compliance spare still counts.
- A booked engineer at T-8 must kill the T-2 “we still need access” text.
- Lettings flyers wait until the last access slot is confirmed.
Summary
Scenario 966 is the boiler clock: T-7 access, T-2 only if still unbooked, never after the engineer is in the diary. 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 T-2 left after the occupant already booked, you did not chase the service. You trained them to ignore you.
Not a CodeCanyon “boiler SMS” pack. Device meters apply — Twilio vs Android SMS gateway.
Key takeaways
- Scenario 966 is annual boiler-service T-7 access SMS — not listings, lettings, key day, rent, HOA, open house, auction, exchange, gas-safety T-14, valuation, inventory, EPC, keys 17:00, void frost, meter-read T-2, or evening viewing.
- Portal OTP stays off the boiler 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 compliance spare still counts.
- A booked engineer at T-8 must kill the T-2 “we still need access” text.
- Lettings flyers wait until the last access slot is confirmed.
Related reading
real estate SMS, scheduled SMS, how an Android SMS gateway works, GOV.UK gas safety for landlords.
Context
Annual services land on a calendar. Occupants book from a phone. Lettings still wants a Monday flyer.
Free (300 SMS lifetime) is a rehearsal block. Developer is 25,000 SMS per year.
Core scenario guidance
T-7 is the ask. Booked slots kill T-2 and T-1. Timezone is the property city.
Boiler-service roles
| Role | When | Typical fail |
|---|---|---|
| T-7 access ask | Occupant local morning | Sent after a slot is already booked |
| T-2 / T-1 reminder | Only if still unbooked | Fires after engineer confirmed |
| Portal OTP | Transactional, own pool | Dumped onto the boiler SIM |
| Lettings flyer | Held until last access booked | Released at 09:00 into T-7 |
Cost and ownership
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. A compliance spare is a billed device. Resends burn airtime.
Name a weekday 08:00–11:00 on-call for service weeks, not only listings.
Operations
08:20 canary both radios. Abort: hold flyer, keep OTP, skip T-2 if booked. Do not “resend all units.”
Security and compliance
Short bodies. No full addresses plus access codes in one SMS. Authenticate booking hooks. Flyers are promotional.
Decision guide
Ship when 08:20 canary is green and booked slots kill later texts. Delay if phones lock Friday. If handsets are forbidden, CPaaS for portal OTP.
Checklist
- Primary + compliance spare paired.
- 08:20 canary.
- Booked slot kills T-2/T-1.
- OTP isolated.
- Flyer held.
- Airtime before Monday.
- Battery exemptions both OEMs.
- Property-city locale.
- Service-week 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 is an outage on Monday. Watch DLR, not PMS 200s.
Deep dive: scaling and failure modes
Multi-block service months add devices before inventing a hidden unlimited-handset SKU. Raise OEM ceilings; fair-use remains.
Deep dive: integration discipline
Idempotency on unit_id + job_type + offset (t7|t2|t1). 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.
08:20 boiler drill
Canary both radios. Book a dummy slot; confirm T-2 dies. Hold a flyer during the ask.
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
