Record a baseline
Write the phone model, system version and available storage. Keep that note with the source you checked.
Find the actual requirement
Use the provider or store page for compatibility details. A list copied from an older release may no longer describe the current app.
Keep evidence separate
Publisher claims, store compatibility and your own observations answer different questions. Label each one clearly.
Describe an issue
When contacting the provider, include the version, device, mode and error. Do not attach passwords or verification codes.