I forgot my phone's security password its a 4 digit code i can only make 911 calls i'd like to master reset it i have the samsung sch-r451c

To Reset the lock code for Samsung SCH-U750, you can try:-

1. From the main screen, press OK to choose Menu.
2. Select Settings & Tools then press OK.
3. Select Phone Settings then press OK.
4. Select Security then press OK.
5. Enter the Phone Lock Code (default is the last 4 digits of the phone number) then press OK.
6. Select Edit Codes then press OK.
7. Select the desired option then press OK.
   
   • Phone Only
   • Calls & Services
8. Enter the new 4-digit Lock Code then press OK.
9. Re-enter the new 4-digit Lock Code then press OK.

Hope it works out..

Master reset your phone by obtaining Master Security code from your original carrier.

sir if you forgot the password or don't know the security code, You have to master reset the phone. Contact your service provider to get a master reset code at free of cost....You can also visit http://www.unlock-zone.com/ and can see different options there to get unlock code for a price. Choose any price appropriate for you.................

If you forgot the password or don't know the security code, You have to master reset the phone. Contact your service provider to get a master reset code at free of cost....You can also visit http://www.unlock-zone.com/ and can see different options there to get unlock code for a price. Choose any price appropriate for you...................

If you forgot the password or don't know the security code, You have to master reset the phone. Contact your service provider to get a master reset code at free of cost....You can also visit http://www.unlock-zone.com/ and can see different options there to get unlock code for a price. Choose any price appropriate for you.............

it is probably the last 4 digits of your phone number

If you forgot the password or don't know the security code, You have to master reset the phone. Contact your service provider to get a master reset code at free of cost....You can also visit http://www.unlock-zone.com/ and can see different options there to get unlock code for a price. Choose any price appropriate for you.

i have lost my samsung w-299 duel sim password.pls solve my problem.pls reset my password.my email id ([email protected]).

This seemed to fix a glitch I was having with mine.
How Do I Reset My Cricket SCH-R211 Phone?
To reset the handset, to the factory default settings, follow the steps below:

1. From the standby screen, press the left soft key for Settings
2. Select Phone Settings (5)
3. Select Security (3)
4. Enter the lock code, default password is the last 4 digits of cell phone number
5. Select Reset Phone (4)
6. Press the left soft key for Yes to confirm resetting the handset to factory default settings

Note: Reseting the handset, to the factory default settings, will not delete any contacts

Source:
http://ars.samsung.com/customer/usa/jsp/faqs/faqs_view.jsp?SITE_ID=22&PG_ID=557&PROD_SUB_ID=799&PROD_ID=1597&AT_ID=149386

sch-a650.........i need the usb driver so i can use the phone as a modem