Best to try and reset the phone:
# Power the device off.
# Press and hold the '''Home''', '''Volume Up''', and '''Power''' keys.
# Continue holding the buttons even if the Samsung logo appears. The Android system recovery menu will appear if this was performed correctly, and the keys can be released.
# Press the '''Volume Up''' or '''Volume Down''' key to select '''wipe data/factory reset''', and then press the '''Power''' key to make your selection.
# Press the '''Volume Up''' or '''Volume Down''' button to select '''Yes ��� delete all user data,''' and then press the '''Power''' key to make your selection.
# When the reset is complete, press the '''Volume Up''' or '''Volume Down''' key to select '''reboot system now''', and then press the '''Power''' key to make your selection.