If you can tell me (Android/iOS) or what specific issue you are having (installation, lag, etc.), I can give you more tailored advice to get it working perfectly! Share public link
Installing a client like DLB Client V3 is fundamentally different from downloading an app from the official Google Play Store or Apple App Store. Here is the general process for such software:
If you want to continue optimizing your mobile Minecraft configuration, let me know:

