Question about LG CU400 Cellular Phone

3 Answers

LG CU400 i forgot my LG CU400 unlock code. Now when i turn my phone on my phone is locked. How to unlock it. [email protected]

Posted by on

  • 5 more comments 
  • Hey There Nov 30, 2007

    receive call but cannot hear caller speaking

  • Aubry Nov 30, 2007

    no i cant unlock phone to even use it

  • Aubry Dec 01, 2007

    It didnt work. My handset is locked when i turn the phone on

  • Aubry Dec 02, 2007

    That didnt work

  • Anonymous Feb 08, 2008

    i have a LG CU400 phone & it locked up 1 time by me being stupid & playing w/the buttons but then my sister called customer service & got it unlocked the problem is i turned my phone off & then turned it back on & it locked up again i can only call if there is an emergency i 4got the # of the costumer service please help me!does any one know the pin code???

  • jigupatel Feb 10, 2008

    I have new LG Cingular CU400 Mobile phone. Mobile is now transfer from USA to India.

    Phone Description :

    Model : CU400

    Made in Koera


    FCCID : BEJCU400

    IMEI : 011071-00-728477-9

    SIM : 704KPBF728477

    Now, i need Unlock code.


    Jignesh Patel

    Email : [email protected]

  • baileygirl Jul 13, 2008

    I also have a lg cu 400. I've contacted at&t and they can not (or will NOT) help me. I have already tried 0000. That didn't work. Can anyone please help?



3 Answers

  • Level 1:

    An expert who has achieved level 1.

    New Friend:

    An expert that has 1 follower.

  • Contributor
  • 1 Answer

Try 0000 in case it has reverted to factory settings.

Posted on Dec 03, 2009


Locking and Unlocking the Device: FOR LG CU 400

  1. From the standby screen, press Menu.
    LG CU400 - pattlnk_11202006_1832-standby.jpg
  2. Scroll to and select Settings.

  3. Scroll to and select Security.

  4. Scroll to and select Lock Handset.

  5. Select desired option:
    • When Power On
    • When Smartchip Changed
    • Immediately
    • Off
  6. Enter the Security Code, press OK.
    NOTE: The default security code is 0000.
Setting the PIN Code:
  1. From the standby screen, press Menu.
  2. Scroll to and select Settings.
  3. Scroll to and select PIN Code Request.LG CU400 - pattlnk_732006_2018-set_pin.jpgnet/uploads/images/pattlnk_732006_2018-set_pin.jpg" alt="pattlnk_732006_2018-set_pin.jpg" class="h_mi" />
  4. Scroll to and LG CU400 - pattlnk_732006_2018-set_pin1.jpg/" alt="pattlnk_732006_2018-set_pin1.jpg" class="h_mi" />
  5. Enter the PIN code, press OK.
    NOTE: DefaLG CU400 - pattlnk_732006_2019-set_pin2.jpgsrc="" alt="pattlnk_732006_2019-set_pin2.jpg" class="h_mi" />
Changing the Security Code:
  1. From LG CU400 - pattlnk_11202006_1832-standby.jpgr />pattlnk_11202006_1832-standby.jpg
  2. pattlnk_11202006_1835-settings.jpg
    LG CU400 - pattlnk_732006_2022-change_code.jpgct Change Codes.
  3. Enter the currenLG CU400 - pattlnk_732006_2023-change_code2.jpg: The default security code is 0000.
    pattlnk_732006_2023-change_code2.jpgLG CU400 - pattlnk_732006_2023-change_code3.jpgh_miEnter in the New security code, press OK.
    pattlnk_732006_2023-chLG CU400 - pattlnk_732006_2023-change_code4.jpg>
<li class=Confirm Security Code, press OK.

IMPORTANT: If the incorrect lock code is entered more than 3 times the phone will display "ENTER PUK". If this message is displayed contact Customer Care.

Posted on Nov 28, 2007

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 175 Answers

Hi there hope this will work for you
reset code: 2945#*#
please give me a feedback if it wont work.


Posted on Nov 28, 2007

1 Suggested Answer

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

245 lg cu400

Is LG CU400 your mobile model? If it is so then unlock it from its network lock using unlock code. Contact your service provider to get the code. If they failed to provide or ask you to wait for long period it is better to get the code from online providers itself. There are lot of online sites available to provide unlock code like eBay, amazon etc... But i have found the site ,through my search and i have unlocked my LG mobile in that site itself. You can also try the same site to unlock your Mobile easily and safely.

Jun 26, 2013 | Samsung SGH-e315

2 Answers

Can help me find my 8 digit unlock code for a LG CU400

yes surely you can get the unlock code for your LG model mobile,
Just visit this site , it provides the step by step instructions and easy methods for unlocking your mobile from the network lock......if you give your mobile details such as IMEI number, country & network lock means after that within a short period you can get the code for your mobile.....

Nov 03, 2011 | LG CU400 Cellular Phone

1 Answer

Sim 8 digit Unlock Code for LG CU400?

For good place to get the unlock code for LG model, visit this site, it provides step by step instructions and easy ways to unlock the phone lock network ....while for the unlock code you have to give some information about the mobile site that is your IMEI number, network and country lock, then in a short period you can get the code ...

Nov 03, 2011 | LG CU400 Cellular Phone

3 Answers

Free unlock code for lg cu400

Using a free unlock code is very risky. It is not 100% safe and accurate and may harm your mobile phone. The best way to get the LG cu400 unlock code is through an LG UNLOCK CODE website. Use the IMEI unlock code provided by them and your phone is 100% sim lock free.

Jan 02, 2011 | Cell Phones

7 Answers

Lg cu400 cell phone IMEI # 011071003749585

The default lock code (security) is 0000. and default, PIN1 is 1111, and PIN2 is 2222
If you need further help let me know. If you get it wrong enough you will be asked to enter PUK code. Then you only need to call up your provider and they will assist you.

Jun 19, 2008 | LG CU400 Cellular Phone

1 Answer

Lg cu400

You should try the last 4 digits of your cell phone number, if you have changed the default lock code and don't remember it, you will need a little more advance tools to unlock it, you might wanna check and see if you service provider has a repair center in town for a quick lock code read.
if you have the Software drives and cables for it you could use BitPim which is free online. If not, you will need to contact your cellphone customer service reps and find out if any repair centers, if no luck, try to track down a US Cellular repair shop and sweet talk them into reading lock code for you.
Hope this helps

If you need further help, reach me via phone at

Apr 21, 2008 | LG CU400 Cellular Phone

4 Answers


Please,help.LG cu400 lock Cingular.

Nov 30, 2007 | LG CU400 Cellular Phone

Not finding what you are looking for?
LG CU400 Cellular Phone Logo

Related Topics:

1,005 people viewed this question

Ask a Question

Usually answered in minutes!

Top LG Cell Phones Experts

George Etukudo
George Etukudo

Level 2 Expert

334 Answers

Sheldon Dedek

Level 3 Expert

909 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18429 Answers

Are you a LG Cell Phone Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides