I have the Samsung Impression phone and the phone display keeps locking up on me. How does the Samsung Captivate display compare to most of the display phones out there? How does it compare to the IPhone 4? I really like the outter Box hard case ALOT!! I need something like that to protect the Samsung Captivate. Anything like it yet? Confused as to which phone to Buy...the Samsung Captivate or the Iphone 4?? Thanks!