: Give VMOS Pro unrestricted battery usage permission in your main system settings so it doesn't get closed in the background.
Device storage should have enough space for both the VMOS Pro application and the ROM image, which typically requires between 300 MB and 1 GB.
The app will scan your VMOSfile/ROM folder and display the available KitKat image. Select it. vmos pro android 442
You don’t need to root your primary phone, protecting your warranty.
VMOS Pro支持在同一台手机上同时运行多个独立的虚拟机系统——这意味着用户可以同时运行安卓4.4、5.1和7.1等不同版本的虚拟机，实现真正的“系统多开”。需要注意的是，系统多开功能需要开通付费会员才能使用。 : Give VMOS Pro unrestricted battery usage permission
Wait for the installation and decompression process to finish. This configuration setup generally takes between 1 to 3 minutes depending on your device's storage speed. Essential Optimizations for the KitKat ROM
Look for the "Android 4.4.2" or "KitKat" option (often labeled as a "Lite" or "Small" ROM). Select it
Legacy ROMs require minor adjustments to run smoothly alongside modern host processors. Use these configurations to optimize your setup: Enable Root and Xposed Framework
Option 3: The Problem-Solver Post (Best for Reddit or Tech Forums)