Key Takeaways
- Scenario 936 is pilates class door OTP — not salon, calendar deposits, waitlists, studio door-codes, telehealth, vet, garage, driving, notary, implant, visa, physio first-session, optician, tattoo, or barber chair.
- Class OTP is P0. Mat-ready is P1. Merch waits.
- 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 studio spare still counts.
- A cancelled class at 17:50 must kill the 18:05 OTP still queued.
- Pin OTP deviceIds. Newsletter never shares the class radio.
Summary
Scenario 936 is the pilates door. Class OTP first, mat-ready second, retail merch held until the last mat sits.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 sale CSV left at 18:00 and the member is still at the door, you did not start a class. You advertised.
Not a CodeCanyon “studio SMS” pack. Device meters apply — Twilio vs Android SMS gateway.
Key takeaways
- Scenario 936 is pilates class door OTP — not salon, calendar deposits, waitlists, studio door-codes, telehealth, vet, garage, driving, notary, implant, visa, physio first-session, optician, tattoo, or barber chair.
- Class OTP is P0. Mat-ready is P1. Merch waits.
- 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 studio spare still counts.
- A cancelled class at 17:50 must kill the 18:05 OTP still queued.
- Pin OTP deviceIds. Newsletter never shares the class radio.
Related reading
OTP and 2FA SMS, appointment reminders, how an Android SMS gateway works, GOV.UK Health and Safety Executive.
Context
Evening classes stack at 18:15. Members reply from the pavement. Retail still wants an 18:00 CSV.
Free (300 SMS lifetime) is a rehearsal studio. Developer is 25,000 SMS per year.
Core scenario guidance
Class OTP is P0. Cancelled classes kill queued codes. Timezone is the studio city.
Class OTP roles
| Role | When | Typical fail |
|---|---|---|
| Class OTP (P0) | Member at the door | Queued behind evening sale |
| Mat-ready (P1) | Instructor seated | Sent after the class was cancelled |
| Retail merch | Held until last class seated | Released at 18:00 into OTP |
| Portal login OTP | Own pool, always | Dumped onto the class SIM |
Cost and ownership
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. The studio spare is a billed device. Codes burn airtime.
Name a weekday 17:30–20:00 on-call, not only daytime reception.
Operations
17:40 canary both radios. Abort: hold merch, keep portal OTP, skip queued class if cancelled. Do not “resend all mats.”
Security and compliance
Short codes only. No membership numbers plus medical flags in one SMS. Authenticate booking hooks. Merch is promotional.
Decision guide
Ship when 17:40 canary is green and cancelled classes kill OTP. Delay if phones lock at 17:00. If handsets are forbidden, CPaaS for class OTP.
Checklist
- Primary + studio spare paired.
- 17:40 canary.
- Cancel kills queued OTP.
- Class isolated from merch.
- Portal OTP own pool.
- Airtime before 17:30.
- Battery exemptions both OEMs.
- Studio-city locale.
- Class on-call named.
- Device cap includes spare.
Next steps
Review device and SMS volume pricing, device setup, SMS API documentation.
Deep dive: production hardening
Evening cleaner pulling USB at 17:10 is an outage at 18:00. Watch DLR, not booking 200s.
Deep dive: scaling and failure modes
Multi-studio evenings add devices before inventing a hidden unlimited-handset SKU. Raise OEM ceilings; fair-use remains.
Deep dive: integration discipline
Idempotency on class_id + kind (door|ready). 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.
17:40 class drill
Canary both radios. Cancel a dummy class; confirm OTP dies. Hold merch during the wave.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- OTP and 2FA SMS on AndroidAuthentication flows
- multi-device and dual SIM routingCapacity and failover
- SMS delivery reports (DLR)Delivery status tracking
- SMS API documentationLive endpoint reference
