Android SMS Gateway Scenario 1326: Real-estate scheduled SMS in practice

Summary

Scenario 1326 is deposit protection at T-10 11:00 tenant-local: scheme notice out, certificate chase later, board CSV held until DLR drains. 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 prescribed period ends in ten days and the SMS is still behind “just listed,” you did not protect. You advertised the void.

Not a CodeCanyon “estate agent SMS” pack. Device meters apply — Twilio vs Android SMS gateway.

Key takeaways

• Scenario 1326 is deposit-protection T-10 11:00 SMS — not listing, lettings, key day, rent T-3, HOA, open-house, auction, solicitor, gas-safety, valuation, inventory, EPC, keys-with-agent, void frost, meter-read, evening viewing, boiler, check-out, right-to-rent, AST T-28, snagging T-2, or ground-rent T-7.
• A scheme notice that fires at HQ noon after the tenant already left for work is a clock fail, not a CRM nicety.
• 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 lettings spare still counts.
• Hold board CSV until T-10 DLR drains.
• Canary the deposit SIM at 10:50, not at last night’s portal job.

Related reading

real estate SMS, scheduled SMS, how an Android SMS gateway works, GOV.UK tenancy deposit protection.

Context

CRM marks T-10 at midnight UTC. Tenants read SMS at 11:00 local. Sales still wants a board CSV.

Free (300 SMS lifetime) is a rehearsal branch. Developer is 25,000 SMS per year.

Core scenario guidance

11:00 is T-10 scheme, not check-out inventory. Timezone is the tenant, not the head office.

Deposit scheme roles

Cost and ownership

Priced by devices and SMS send volume. You use your own phone and operator SMS credit. The lettings spare is a billed device. Duplicate T-10 burns airtime.

Name a 10:30–12:30 on-call for scheme mornings, not only Saturday viewings.

Operations

10:50 canary. Abort: hold board CSV, keep portal OTP, skip a second “all tenants” blast. Do not “resend branch.”

Security and compliance

Short bodies. No scheme IDs plus full address in one SMS. Authenticate PMS hooks. Board lists are promotional.

Decision guide

Ship when 10:50 canary is green and clocks are tenant-local. Delay if phones lock in the office after 18:00. If handsets are forbidden, CPaaS for portal OTP.

Checklist

• Deposit SIM paired overnight.
• 10:50 canary.
• Tenant locale, not HQ.
• Portal OTP isolated.
• Board CSV held.
• Airtime before 10:30.
• Battery exemptions.
• Idempotent T-10 keys.
• Scheme-morning 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 unplugging USB at 10:20 is an outage at 11:00. Watch DLR, not PMS 200s.

Deep dive: scaling and failure modes

Multi-branch scheme weeks add devices before inventing a hidden unlimited-handset SKU. Raise OEM ceilings; fair-use remains.

Deep dive: integration discipline

Idempotency on tenancy_id + offset (t10|t3). 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.

T-10 10:50 drill

Canary. Fire one T-10. Confirm DLR before board CSV. Hold listings during the wave.