The phone is locked

what model is your phone ?

For this problem contact the mobile service provider,........

very easy just put this code without card sim *2767*3855# and the code being 00000000 if ur problem not solved just put this code to reset eprom network *2767*2878#

if you set the pass code on the samsung then what you need to do is take it to AT&T store. and ask them to remove unlock code. aka phone lock system.

It is possible to put code on E71, You go to settings then security, you will enable the keypad security code and enable your phone code also. With these nobody can access your phone without asking for security code. Take note Phone, sim and keypad pin code must be enable. Thanks

Hello,

Thank you for your solution proposition and your help. I have put the code and the phone works now.
In fact, it was a problem of a wrong code. I forgot i put my birth date.

Thanks a lot,

John

Try the reset code:
*#7328748263373738#
Then your securtiy code should be reset to :12345.


Please rate my solution if this helps.

1.insert this code *7465625*28782# without sim card.
2.the phone will show you message of protected activated,click o.k.
3.again insert the same code without sim card.
4.now put in your sim card.
5.when you put in different sim card(network),phone will ask for code,insert all the 0's phone will work on any network

Hope this works for u

1-Turn on the phone without sim card .
2-Pull off the battery cover and insert any non-accepted sim card (without turning off the handset)
3-Do full reset *2767*3855# , phone will reboot and goes to Menu .
4-Customize Sp-lock code *7465625*638*00000000*00000000#
5-Unlock your phone with new SP code #7465625*638*00000000#
6-Enjoy G600 unlocked

Tested with few pieces

hi Beckki,
There is only one way to access your phone without losing your data in your phone:
   Block your sim by entering wrong lock code and then it will ask for the PUK code that you will get from your service provider. Enter that PUK code and your phone is unlocked.
Thanks...