I've just received my Samsung Acclaim in mid July but already it acting up. My programs are running slowly and my screens freezes up, sometimes randomly, after I close a program, or if I've just ended a call. I also have been having to force close my programs. I have the Task Manager and Astro filer and I'm constantly ending the programs and deleting a lot of files, but it continues to run slow. Is this normal or does this call for a replacement?

And also, my roommate has been using my charger to charge her blackberry. Could this affect my phone/battery?