Use a trusted source. For educational purposes, search for WhatsApp 2.24.9.85 repack for Marshmallow. The file name should look like: WhatsApp_Marshmallow_Repack_v2.24.9.85.apk
What to look for:
First, a hard truth: Meta (WhatsApp Inc.) no longer officially supports Android 6.0. As of early 2024, WhatsApp officially requires Android 5.0 (Lollipop) as a minimum for old versions, but new features and security patches are increasingly skipping Android 6 and 7. The last official version for Android 6.0.1 was 2.24.9.xx. download whatsapp for android 601 repack
However, a "repack" is a modified version of the original APK (Android Package Kit). Developers take the final stable version that worked on Marshmallow and "repack" it to: Use a trusted source
Important Note: A repack is not a hacked version for gold or unlimited status. It is usually a tweaked installer for compatibility. Important Note: A repack is not a hacked
Once installed, open WhatsApp.