Samsung

=Samsung Phone Data Erase=

Master Clear

 * 1) Make Sure the SIM Card has been removed from the phone
 * 2) Press *2767*3855#
 * 3) Wait for the phone to reset and replace the SIM card

If there is no Master Clear
(IN PROGRESS
 * 1) Press Menu, 7, 1, 2 (If empty, skip to step 3)
 * 2) Press Options, 4, 2, Delete, Delete