Ok so I am noob to the Android Side of Game Dev, I have created a small basic scene with 5 bsp brushes and like 3 static meshes and a player start within Unreal Engine 4. When I package the game to my Samsung Galaxy S5 mobile phone after installation I try open the game it just crashes. any help would be greatly appreciated.
You probably have settings for desktop pc. Read about mobile limitations. I would guess that some materials are complicated and crash renderer.
As Nawrot pointed out … Performance Guidelines for Mobile Devices … also this might help … Mobile Game Development.
You might also be able to use this post to try and debug your issue: Android: How to debug apps failing to start?
When you created the project did you select Desktop Settings or Mobile Settings?