Look for "V1.04" or higher for the original Pro Max, or "V2.0" series for the Ultra 2 versions.
Quality updates will always include a manifest of what was improved (e.g., "Optimized compass," "Added palm-to-screen off"). Step-by-Step Installation Guide hk8 pro max firmware high quality
Optimization for the SF32LB551 chip to ensure 60fps animations. Look for "V1
Open the app on your smartphone and ensure the watch is synced via Bluetooth. hk8 pro max firmware high quality
Go to Settings > Reset on the watch to clear cache partitions.