# Troubleshoot USSD Issues

If you are experiencing problems with the USSD (Unstructured Supplementary Service Data) menu not appearing on your terminal, here are the steps to resolve the issue:

### Correct USSD Number Format

* Ensure Proper Prefix: When dialing a USSD number, it is crucial to start the number with either an asterisk (\*) or a hash (#). The correct prefix depends on your mobile processor's standard.
* Example: If your USSD code is '12345', dial it as either '\*12345#' or '#12345#', based on the standard.

### Additional Steps for Specific Models

* For Q2 Terminals:
  * If the USSD menu still does not appear, download and install the [Q2 STK](https://ftp.wizarpos.com/advanceSDK/Stk-q2-20190712-q1_platform.apk) application on your Q2 terminal.
* For Other Terminal Models:
  * If you are using a terminal model other than Q2 and encounter this issue, please contact WizarPOS for support.

{% hint style="info" %}

### Note on Firmware Limitations

* No USSD API Support: Currently, the firmware does not support any dedicated USSD APIs. Therefore, USSD numbers must be dialed manually using the terminal's dialer feature.
  {% endhint %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://smartpossdk.gitbook.io/cloudpossdk/faq/sim-ethenet-wifi/troubleshoot-ussd-issues.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.