# Guides - [App User Guide](https://docs.tapxphone.com/guide/app-guide.md): User Guide for the Android application v. 2.1.0 and higher - [Getting Ready to Use](https://docs.tapxphone.com/guide/app-guide/app-start.md) - [Viewing the App Version](https://docs.tapxphone.com/guide/app-guide/app-version.md) - [Trusted Device Criteria](https://docs.tapxphone.com/guide/app-guide/trusted-devices.md) - [The device is locked for the App](https://docs.tapxphone.com/guide/app-guide/trusted-devices/device-blocked.md) - [Device Setup](https://docs.tapxphone.com/guide/app-guide/device-setup.md) - [Sign in](https://docs.tapxphone.com/guide/app-guide/sign-in.md) - [Change and Recovery Password](https://docs.tapxphone.com/guide/app-guide/change-password.md) - [Payments acceptance](https://docs.tapxphone.com/guide/app-guide/payments.md) - [Payment via manual PAN entry](https://docs.tapxphone.com/guide/app-guide/payments/pan-entry.md) - [Payment cancelation](https://docs.tapxphone.com/guide/app-guide/reversal.md) - [Refund](https://docs.tapxphone.com/guide/app-guide/refund.md) - [Why and How to close the Business Day](https://docs.tapxphone.com/guide/app-guide/business-day.md) - [Merchant's web portal Guide](https://docs.tapxphone.com/guide/portal-guide.md) - [Log in to Merchant’s portal](https://docs.tapxphone.com/guide/portal-guide/web-sign-in.md) - [Cashiers Management](https://docs.tapxphone.com/guide/portal-guide/cashiers.md) - [Device Management](https://docs.tapxphone.com/guide/portal-guide/device-management.md) - [Transactions Log](https://docs.tapxphone.com/guide/portal-guide/all-transactions.md) --- # 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://docs.tapxphone.com/guide.md?ask= ``` 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.