The USSD session duration depends on the Tel co.
A USSD session is 180 seconds long however, if a customer takes longer than 30 seconds to respond the session times out.
A session may be timed out if the below scenarios occur:
- Application response timeout- 15s
- USSD connection to application timeout- 10s
- And session timeout(customer response)- 60s
For any further clarifications send an email to email@example.com.