Key Takeaways
- Scenario 130 is vaccine cold-chain fridge-log USSD: a short temp menu at the clinic. Timeout is a radio miss, not an in-range reading — not LLIN issue, birth notify, or ANC.
- A log that treats dropped sessions as “OK” will hide a warm fridge until the next campaign.
- Do not USSD lot numbers or the antigen. Fridge id, band (ok/warn/out), and a supervisor override.
- Staff portal OTP stays on another device.
- 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 130 is an EPI desk. Nurses dial a short code and score the fridge twice a day. Mosquito-net issue and camp rations are the wrong list.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. USSD · Developer Center. GSMA.
Fridge tree, not a net
Keep the tree to three steps. Persist only a committed band. Map to fridge id + day + slot (am/pm).
If a dropped *808# became “OK,” you hid a warm box until the next campaign day.
USSD vs alert SMS
| Lane | Body | On timeout | Device |
|---|---|---|---|
| Temp log | Id + band | Retry / paper | Clinic modem |
| Out-of-range alert | Fridge, call | DLR separately | HQ modem |
| Staff portal OTP | Digits | Auth | Dedicated |
Caps: 2 / 5 / 15.
Timeout ≠ in-range
One retry, then paper. Deliverability. REST: PHP, C#. MCP wraps REST.
No lot numbers
Band only. Lots stay on the paper log.
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. Pricing.
Twice-daily log
Fridge ids
Log fridge id + slot + band, not lots in chat. Rotate keys. Not a CodeCanyon EPI pack.
Retry then paper
If you will treat timeouts as OK, do not run USSD fridge logs.
Checklist
- Commit only on band.
- Timeout queue for retry.
- No lots in the tree.
- OTP on another device.
- Webhook signatures.
Next steps
Drop a session mid-menu; prove the slot stays blank until a committed band. Downloads · Docs.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- USSD balance and menu automationOperator USSD codes
- SMS API documentationLive endpoint reference
- device and SMS volume pricingPlans and allowances
- Android SMS gateway product guideDefinition, product, and how to buy
