Build interactive services on *921#
Launch menu-driven USSD on Hellio's shared short code without owning your own. Rent an extension like *921*100#, and let your webhook drive every step. Works on any phone with no internet, no app and no smartphone required.
Test the full flow in the sandbox first, then pay per session at Ghana network rates.
USSD session
Dialled *921# on any phone
Hellio Services
1. Check balance
2. Buy airtime
3. Pay a bill
4. Talk to support
Thank you for using Hellio.
How it works
From short code to live menu in three steps
Skip the carrier paperwork. Ride Hellio's shared short code and control every screen from your own backend.
Rent an extension
Reserve an extension on the shared *921# short code, for example *921*100#, and point it at your service. No dedicated code or carrier contract needed.
Wire up your webhook
Each key a caller presses posts to your callback URL. Your webhook returns the next screen, so you build the whole menu tree in code you already own.
Go live on any phone
Callers dial your extension and step through your menus on any handset, with no internet and no app. You pay per session at Ghana network rates.
What you can build
Everything you need for USSD
Menus, self-service and payments flows, all through the same Hellio platform you already use for SMS and voice.
Shared short code
Launch on Hellio's *921# short code straight away, with no need to license or maintain a code of your own.
Rentable extensions
Reserve an extension such as *921*100# for your service and keep it for as long as you need it.
Menus by webhook
Your callback drives each step. Return the next screen on every keypress and build any menu tree you like.
Works on any phone
Reach every customer on any handset with no internet, no app and no smartphone required.
Sandbox to test
Simulate full USSD sessions in the sandbox and verify the flow end to end before you go live.
Pay per session
Only pay for the sessions you serve, billed at Ghana network rates with no monthly minimums.
Pay per session, nothing more
There are no setup fees for the shared short code and no monthly commitment. You rent an extension, then pay per USSD session at Ghana network rates. Costs scale up and down with real usage.
View pricingTest before you spend
Simulate complete USSD sessions in the sandbox at no cost. Wire up your webhook, walk every menu path, and only switch to live billing once the flow is exactly right.
Read the docsShip a USSD service on *921# today
Create an account, rent an extension and build your menu in the sandbox in minutes. Go live when you are ready.