Before downloading the Android package
Check the destination opened by the download button and read the publisher’s package details. This site provides an access route, not an APK stored on its own server. An app name or an attractive image does not verify the identity of a file. The current version, file size and minimum Android release must be confirmed at the source.
Save a complete file
Look in your browser’s Downloads screen to check progress. If a transfer stopped, distinguish it from a completed file before opening anything. Multiple attempts can leave confusing duplicates. On a limited data plan, read the source’s stated file size before starting. Do not rename a saved web page into an APK; that does not make it an installer.
Review Android prompts
Check the app identity displayed by the installer. Installation-source permission and permission to access contacts or other phone data are different decisions. Do not turn off device protection to force an installation. If a warning or requested access is unexpected, stop and ask the publisher for clarification.
Record an installation error
Keep the exact message, phone model and Android version. Lack of storage, an incomplete package and an incompatible update require different checks. Before deleting an existing installation, make sure you can recover the associated account. Read the login guide if the app opens but account access fails.