# Downgrade an APK? Android has changed its behavior when installing a new APK file. Until ICS (ice cream sandwich), it didn't matter if the new APK had a lower or higher **android:versionCode** in AndroidManifest.xml. After that, it's mandatory a higher versionCode. We can't guarantee "when" the new behavior was introduced, but we noticed it was sometime around **Jelly Bean**.\ \ When trying to install a lower version code through ADB, you will get the message: INSTALL\_FAILED\_VERSION\_DOWNGRADE. In this case, you can force with the undocumented -d flag: **adb install -r -d my.apk**. Pushlink can't force it because it just launches the APK and the control is passed to the OS. So, the installation process will fail with no specific error message.\ \ Remember that Pushlink can't perform downgrades when the OS does not allow it. --- # 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.pushlink.com/downgrade-an-apk.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.