samsung home a.k.a. twlauncher error/failed
if possible to access setting, go to settings/application/manage app/"all" tab/scroll down until u found Samsung Home open it, first, force stop then clear cache and data but if u cannot access the setting and don't want to reset your phone to factory settings (it will delete all of your data) try to find wi-fi that your phone can access and a computer that have internet. Now, using computer go to android market and log in your acct. then find application called
" go launcher ex " click on that app and install it (don't worry, its free app) then, with your malfunctioning phone but wi-fi connected, it will download the app and install itself. Now the tricky part, once installed a pop-up will ask you if you want to switch either go launcher or samsung home and below a check-box of the default you want to use, (REMEMBER THAT DO NOT CLICK ON THAT CHECKBOX) now, choose go launcher ex as your new home (JUST LEAVE THE BOX BELOW UNCHECKED) you can now operate your phone (but not fixed yet) you can now access the setting, just follow the procedure i mention above but don't exit on that page,
now that we are almost done with the fix, scroll down you will see clear default button and hit that. Restart your phone then a pop-up will launch again now you can choose what fits for you "go launcher ex" or the classic "samsung home" but after you choose, check that checkbox for your default home if you choose samsung home, you can now uninstall go launcher ex.
Here is my advise:
Try to install application called Smart Task Switcher or Smart Taskbar and pin to your task bar, with that application slide down your tastbar and you can access the phone setting instatly even if twlaucher error happens again, and there is no need to find wi-fi hot-spot, install go laucher ex again, just go to setting and fix it and dont forget to reboot when you're done.