This method tested by me if you have Samsung Exhilarate i577 device in that issues of like hang on logo, restarting problem, pattern lock, screen lock then you can use this guide and this without any box you can do just before use remember of must be charged your device battery cause if low device turns off during the process not starting so carefully use.
Before use save your data which is in device cause some impotent like contacts, messages, emails, photos, videos, calendar, notes etc if in SD Card so no need to backup but I suggest first remove SIM Card, or SD Card in device after following this guide or need hardware related that to be working well  which is device volume up, down or power keys for that solve need keys. Must be charged a battery up to 75% now let's go how to solve above issues using this guide ?

Procedure

  • Press and hold Volume Up + Down + Power together until Samsung logo dispalyed leave Power key only keep pressing continue Volume Up + Down until Android System Recovery leave Volume buttons
  • Select "Wipe Data / Factory Reset" from Volume Down button Press Home key for confirm
  • Select "Yes — delete all user data" option using Volume Down key Press Home key for confirm
  • You will see Wipe data processing after that done
  • Last select "Reboot System Now" wait for device start normal a few minute
  • Congratulation you are done