How to Hack your LG CU400 Phone


LG CU400

First let me bore with a little history about my phone…



I had a Cingular RAZR until now and was fed up with the s-l-o-w interface and GPRS speed. Since my first year of the 2-year plan was up, I qualified for a phone upgrade. After some pondering I decided to go with one of the newer 3G phones.

The LG CU400 looked impressive, it’s got looks and function. After tinkering extensively with the CU400 for a week, I have a pretty good idea what this phone is capable of, and I’m posting this review so you can decide for yourself whether it’s suitable for you or not.

First of all, the CU400’s bluetooth won’t play nice with other peripherals, specifically, it won’t accept ANY data from any device. While talking to a Cingular rep, she acknowledged that the LG CU400 Bluetooth will only connect to a BT headset or BT printer. However, not being the yielding type, I poked around until I’ve managed to change that; the default setting can be overridden by entering the service code and choosing BT for data. Hence, I can now download content directly from my computer to the phone.

Almost all cellphones have some hidden codes that allow technicians and authorized employees to descend deep into the bowels of our beloved cellphones… The question is what’s the code and how to use it? (more on that below) J2ME (Java micro edition) apps accessing the internet have two options only:
  1. Yes, always ask
  2. No, never grant
I’m sure that’s in place for security reason, but it also means you will have to choose an option EVERY TIME a JM2E app connects to the internet (think about Opera mini)

Pros:
  1. RTSP Streaming (plays mp3 and real player files)
  2. Brilliant screen
  3. Zippy interface
  4. Task manager (let’s you switch between open apps)
  5. Tons of tools
  6. Fast internet speeds
  7. Great button layout
  8. Flawless video streaming, even with EDGE
  9. Great speaker (except for voice)
Cons:
  1. Speaker distorts voice above level 3-4 (of 7)
  2. Escalating ringtones only
  3. Meager 16mb memory
  4. No PC Sync support
  5. Annoying VERY loud startup and shutdown chime
I don’t know why people complain about the monochrome external screen, I think it’s stylish, practical and easier to read, it’s supposed to be informational only. Photo ID’s are just a novelty, how many photos can you possibly have?

Overall very useful phone does it’s job well and perfect shape.

And now to the fun part…

How to hack your LG CU400 phone

Follow these instructions carefully

From the home screen, type in this code:
277634#*#
If you entered the code correctly a hidden menu should show up. Navigate to the following item: Port Setting > Data Setting > BT Set for Data. That’s all. Now press the [END] button and cycle your phone off and on again; you should be able to send mp3’s to your phone now.

If you’re really brave, and you want to mess around with your phone even further (not recommended…) you can type in another code, which will bring up even more options. While in the hidden service menu, type the following code: 2945#*# To exit just press the [END] key. PLEASE make sure not to mess around too much, it may render your phone useless !
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71 people have left comments

Amazing stuff

crapy joe wrote on August 8, 2007 - 2:53 pm | Visit Link

I have a LG CU-400, one that was given to me, less the smart card. I have a usable AT&T smart card, but I don’t have an usable security code (usually tied to the last 4 digits of the original phone number), so what am I to do? Any suggestions?

hammond_ham wrote on November 12, 2007 - 12:43 pm | Visit Link

You’ll probably have to call up AT&T in order to get the correct code.

joshmax wrote on December 17, 2007 - 2:46 pm | Visit Link

Excellent instructions on how to enable BT to import from my Mac.

Next, how do you move the files from the BT files to the RingTone files??

ramcclain wrote on May 11, 2008 - 5:04 pm | Visit Link

I believe it shows up under audio & ringtones as well

joshmax wrote on May 11, 2008 - 5:05 pm | Visit Link

Mr. Genius, do you know if this works for the little brother cg300?

Thanks
P

perry wrote on May 11, 2008 - 5:06 pm |

Try the 2945#*# code form the home screen.
or this code: 2945#*88110#

The following code should work on all LG phones:
*#06# shows IMEI information

joshmax wrote on May 11, 2008 - 5:06 pm | Visit Link

The BT code didnt work for the CG300, any other ideas for that model? Thanks:)

Anonymous wrote on May 11, 2008 - 5:07 pm | Visit Link

All,

Thank you for this useful information. It’s especially helpful if one needs to prevent a family bandwidth hog from running up the data bill. My previous phone, a Samsung x507 (terrible voice quality) had the option of modifying the MediaNet settings right in the main menu, but the cu400 does not. Accessing Modem Setting | GRPS Attach | When needed (instead of Power on) did the trick. No access to Cingular Mall, and I can still call and text. I’m extremely pleased.

Again, thank you.

–Anonymous Coward

Anonymous wrote on May 11, 2008 - 5:08 pm | Visit Link

Hey, I don’t wanna bust your bubble, but I think you can still change those settings under Settings > Connection > Network Profiles

joshmax wrote on May 11, 2008 - 5:09 pm | Visit Link

I only have the option to view the Media Net settings in Network Profiles in my cu400 with Cingular, whereas the Samsung x507 allowed me to tab down into each setting and modify. If I’m missing something, feel free to enlighten me.

–Anonymous Coward

Anonymous wrote on May 11, 2008 - 5:10 pm | Visit Link

Yeah you’re right

joshmax wrote on May 11, 2008 - 5:10 pm | Visit Link

Okay, so I input the code that you said, pressed the right keys, and it said BT data enabled. BUT, my iSync still won’t recognize it … any hints?

P-ranz wrote on May 11, 2008 - 5:11 pm | Visit Link

afaik this phone will never work with iSync because it does not support PC Syncing. However, you should be able to send & receive files from the Mac.

joshmax wrote on May 11, 2008 - 5:11 pm | Visit Link

Hi; thanks for the code.

I notice the same menu has a “USB Set for Data” option as well. I’ve set that, re-booted the phone, and have a USB cable for the phone. I’m hoping this will let me transfer files to/from my non-Bluetooth Mac. It’s not detecting the phone automatically, though. Do you know if there’s some software that will let me do this?

Kirin wrote on May 11, 2008 - 5:12 pm | Visit Link

I’ve been told by a Cingular rep that a USB cable can connect your computer to the internet, that’s all.

Look for a program called bitpim, it may help you.

joshmax wrote on May 11, 2008 - 5:12 pm | Visit Link

Thx for all the good information…my problem is the following: I am working in a country where the bank used is different then Cingular’s…My phone is already unlock but I cannot find a way to change the my band settings…I know the phone is a Quad…Any Help would greatly b appreicated.

ito wrote on May 11, 2008 - 5:13 pm | Visit Link

has anyone found a way to move mp3s from BT Files to Ringtone Files? furthermore, is there a way to delete the mp3 ringtones that come stock?

voideo wrote on May 11, 2008 - 5:13 pm | Visit Link

I believe mp3’s from bluetooth are readily available to be used as a ringtone, as far as deleting built-in tones - I believe that cannot be done.

joshmax wrote on May 11, 2008 - 5:14 pm | Visit Link

I don’t know anything about hacking into the phone but you can trick the phone setting the mp3 to ringtone before the tranfer is complete.

Hacker_In_Training wrote on May 11, 2008 - 5:15 pm | Visit Link

is there anything else of worth that you can do to this phone besides Bluetooth transfers? I also was wondering why this phone is not compatible with the
SMS Message feature offered by Mac’s Address Book. is there a way to change this?

Anonymous wrote on May 11, 2008 - 5:15 pm | Visit Link

any way to dissable certain menu options such as ATT Mall, MEdia Net, Cellular Video, PPT, Entertainment, etc.?

Anonymous wrote on May 11, 2008 - 5:15 pm | Visit Link

afaik those options are built-in, and cannot be disabled.

joshmax wrote on May 11, 2008 - 5:17 pm | Visit Link

Josh- Under the menu Phone Test mode > Port Setting , there’s an option, number 4, Mass Storage. Selecting that yields the message “Fail!! Try to set Mass Storage” What can I do, or if further expertise is needed, who can help me find codes to further unlock the phone’s memory?

Anonymous wrote on May 11, 2008 - 5:17 pm | Visit Link

Curious to know if, in the hidden menu, can you change anything to allow you to use custom tones for your “Message Alert” tone??

Anonymous wrote on May 11, 2008 - 5:18 pm | Visit Link

yeah, i second that question. ive looked around and havent found anything. that might ba part of the phone’s inherent filesystem

Arrowhead wrote on May 11, 2008 - 5:18 pm | Visit Link

hey how do i make custom ringtones on my lg cu400 phone i go to record voice i record a song i want and it comes up an amr not mp3 anyway i can make it an mp3 thanks i jsut got this phone for my birthday

Anonymous wrote on May 11, 2008 - 5:18 pm | Visit Link

Under the menu Phone Test mode > Port Setting , there’s an option, number 4, Mass Storage. —- I get the same error, don’t know what that is.

joshmax wrote on May 11, 2008 - 5:19 pm | Visit Link

have the cu400. i purchased a USB data cable so i can transfer music from my computer to the phone, but the USB connection is not recognize and i have found no drivers.

are these codes what i need to use ??

Anonymous wrote on May 11, 2008 - 5:19 pm | Visit Link

yea ummm,

i still cant change

the record voice thing to convert

into an mp3 instead of that amr.

do i need to buy a usb cable

for my phone?

Anonymous wrote on May 11, 2008 - 5:20 pm | Visit Link

I don’t think a cable will help you because you cannot access the voice records of the phone anyway

joshmax wrote on May 11, 2008 - 5:21 pm | Visit Link

Hi guys, I am wondering if you know how to unlock LG CU400 from ATT/Cingular? Any comments will be greatly appreaciated. Thanks!

Lana wrote on May 11, 2008 - 5:21 pm | Visit Link

how do i make my ringtones

Anonymous wrote on May 11, 2008 - 5:21 pm | Visit Link

Instead of buying any USb cords for the LG CU400 phone, I bought a Bluetooth USB Adapter (6 bucks on ebay) and can easily transfer data to and from via bluetooth. You can make your mp3’s and wav’s into ringtones using the program coolringer. From there you can use the bluetooth to transfer it. Coolringer can convert most songs to be used as ringtones on this phone but sometimes it doesn’t work out. Overall, this is the best and cheapest way of doing data transfer.

Anonymous wrote on May 11, 2008 - 5:22 pm | Visit Link

I have an older iBook running OSX 10.4.10, no BT adapter or USB cable yet. I did take my CU400 to a local store and try it with a MacBook’s built-in BT some months back. All I got was what looked like an empty file system. After discovering this post, I repeated the experiment with the magic code entered, but nothing changed. Am I missing something that I need to do to see directories/files? Can someone point me to what I need to do/should expect to see??

I have found a local source for a USB cable and it seems that this phone will work with BitPim, even though not officially supported. BT seems better though. (Can BitPim work through BT?) I can used the BT adapter for other purposes, unlike the proprietary cable.

As far as my goals, I want to be able to get pictures & video out of the phone, silence the annoying start & shutdown sounds, maybe modify ringtones and tether my iBook for occasional Internet access. Ditto for wife’s XP PC.

THANKS!

Anonymous wrote on May 11, 2008 - 5:22 pm | Visit Link

mr. genuis, do know how to make lg cu400 enable in the philippines? tnx…

Anonymous wrote on May 11, 2008 - 5:22 pm | Visit Link

you saw an empty folder because all the CU400 will show is the audio/video/images folder - which looks like they were empty.

google wrote on May 11, 2008 - 5:23 pm |

with regards to the LG cu400 is there any way I can change the font or text size by using a hidden menue, also does unlocking or unbranding a phone (cu400) give you more menu options like font sizes or brightness??

Thanks, Bill

Anonymous wrote on May 11, 2008 - 5:24 pm | Visit Link

i got some .jar java files and want to use them in cu400. when i send them to the phone via BT i get a ?next to the file and cant figure out how to move them to the games folder. with my old razor i could do this but cant figure it out with this lg. im thinking ill have to get bitpim and a usb cable to get it through the file system. any help would be grat.

jeremiah wrote on May 11, 2008 - 5:24 pm | Visit Link

This is not directly related, but does anyone know if there are any settings in this menu to change it so that when I use the phone as a bluetooth modem to connect to my own DIALUP provider it charges me for airtime instead of data transfer? No matter how I set things up it seems to charge me for data transfer even though I’m just calling my dialup provider. I’m thinking maybe there’s a setting in hrere to fix that?

Anonymous wrote on May 11, 2008 - 5:24 pm | Visit Link

Does anyone know the code to unlock the cu400 so it is compatible with tmobile?

Anonymous wrote on May 11, 2008 - 5:25 pm | Visit Link

thanks for the codes but i want to know how you get to browse the net using the bluetooth?

Anonymous wrote on May 11, 2008 - 5:25 pm | Visit Link

To unlock your phone from AT&T/Cingular you need to ask them for the unlock code - they’ll send you the code in about 10 days

joshmax wrote on May 11, 2008 - 5:25 pm | Visit Link

To be charged by data instead of minutes you have to connect via GPRS not dial a number.

To connect via GPRS enter the following info:
Account name:
Password: CINGULAR1
Telephone: #99***1#

joshmax wrote on May 11, 2008 - 5:26 pm | Visit Link

Unbranding a phone means updating or flashing the firmware (after unlocking). To find out if an unbranded phone has the features you looking for - you have to ask someone who has an unbranded phone. In the CU400 case I believe you won’t gain anything by unbranding.

joshmax wrote on May 11, 2008 - 5:27 pm | Visit Link

can anyone help me, please ! i record a song, i want to set it as ringtone, but it come up with amr not mp3. can anyone shown me the way make it into mp3, please!!!

Anonymous wrote on May 11, 2008 - 5:27 pm | Visit Link

My CU400 can’t display russian letters, even when I select any Unicode encoding option from Character Encoding under Media Net>Browser Settings. I installed Opera Mini but it did not help. I had a Nokia phone before and it displayed russian characters without any special adjustments. Is there a way to fix this phone to display russian characters correctly? btw, I have the same problem with sms messages as well. :((

Big Thanks!

Anonymous wrote on May 11, 2008 - 5:28 pm | Visit Link

want to Uplaod/transfer My Photos, Audio, and video to the computer to Snapfish/photobucket/vimeo/youtube. I have the USB cable. Everytime I dconnect to the computer it says hardware found and because I’m on the library computer it asks for the administrators password. Would this usb cable work otherwise to upload to photos/audio/video? Would i need software or would the bluetooth Jabra A320 work? I have a PowerMac g4 but no internet. Could I take it to a cafe with internet and then would the USB cable work? I’m trying to figure this out because I don’t know how to bypass the admin and the library and I have no internet at home.

Ireland wrote on May 11, 2008 - 5:28 pm | Visit Link

Don’t know if your code thing works (or how), but I have two LG phones (CU515 and CU575) I have bluetooth on the phones and on my imac. I was able to transfer the MP3 files over the the 575 with no problems, but when I try it on the 515, it keeps failing. Any ideas on what to do?

Anonymous wrote on May 11, 2008 - 5:28 pm | Visit Link

I didnt listen to what you said and screwed up my phone.DO NOT DO RANDOM KEY TEST

Anonymous wrote on May 11, 2008 - 5:29 pm | Visit Link

Hey! there thanks so much for your code for my lgcu 400 phone now I will be able to send mp3 ringtones to my phone thanks agian.

Carly jb

Carly jb wrote on May 11, 2008 - 5:29 pm | Visit Link

I’ve connected my MacBook to my LG cu400. But when I click “Browse Device,” the folder is empty!

How can I transfer the photos and videos to my computer?

Thanks!

train wrote on May 11, 2008 - 5:30 pm |

Hi, I forgot to say in my previous post that I connected via Bluetooth. I also used your advice about hacking into the phone. But it made no difference.

train wrote on May 11, 2008 - 5:30 pm |

Ok, so all this is great, but how do i take of the annoying noise that the phone makes every time i send a message or change a setting?
and i agree don’t choose the random key test that was a crazy ride! I wish i read that post first!

Jason wrote on May 15, 2008 - 2:15 am | Visit Link

That’s the problem - you CAN’T disable it.

joshmax wrote on May 16, 2008 - 5:49 pm | Visit Link

Is there anyway to unlock the phone to use with any carrier other than going thru cingular? I have tried taking it to places out here (netherlands) that have unlocking services and they cant do it…help please??!?!!

MeGs wrote on July 30, 2008 - 4:37 am | Visit Link

Yes. You have to request the unlock code from cingular, they will provide with instructions of how to unlock the phone.

Afaik, there’s no way to unlock a cell phone without the code, unless you flash the ROM and replace it with the original LG CU400 ROM. You’ll have to research through the internet for more info how to do that.

joshmax wrote on July 30, 2008 - 9:57 am | Visit Link

I’d like to repeat anon.’s question- how do I get this code for my LG CU515 phone?

Zachary Mino wrote on July 30, 2008 - 8:42 pm | Visit Link

I figured out how to use a data cable to get mp3s and stuff onto the LG CU400.

You need to go to the AT&T website and get the “Communication Manager” program. Typically this program is used for turning your phone into a modem that your laptop can connect through. Install this. The reason you need this is because Communication Manager will register your phone as a device with windows. Without doing this BitPim won’t see the phone.

Now download BitPim. From here, when it asks to search for a phone tell it to look for “Other CDMA phone” or something like that. It should find your phone. If it doesn’t, make sure you are connecting the phone in the same USB port you autodetected the phone with Communication Manager. This was a problem I had.

To access pictures you’ve taken on the phone you need to use “Filesystem” in bitpim. Location for pictures is /LGAPP/Media/Images/Graphics. Be careful when working in this menu as you _CAN_ delete critical files and brick your phone.

Vix wrote on August 14, 2008 - 4:53 am | Visit Link

hey josh

thanks for all the info. i’m amazed at how long you’ve offered support on this thread! hope you’re still here… i saw you say that the phone will never work with mac’s isync program… do you know if there’s any way to back the address book up to a mac? (i’d been most happy if i could get all the entries in my address book onto the phone without doing it manually)

thanks either way!

J

Jo Jo wrote on September 19, 2008 - 12:14 am | Visit Link

Have you tried using BitPim?

joshmax wrote on September 19, 2008 - 11:21 am | Visit Link

Hey!
I found you through an angelina jolie picture that i found on your last blog. this is the link for the post: I just wanted to know where you got the picture originally. I need it for a project.
Please let me know asap.
Thanks!

Veronica wrote on January 16, 2009 - 12:25 pm | Visit Link

I can tell you but then I’d have to kill you.

joshmax wrote on January 16, 2009 - 12:31 pm | Visit Link

it doesnt matter haha
i just need to know wheres the original so i can buy a bigger size of the picture with higher dpi.

Veronica wrote on January 16, 2009 - 12:46 pm | Visit Link

There’s no higher resolution anyway . . .

joshmax wrote on January 16, 2009 - 1:28 pm | Visit Link

Eather way, I need to have an authorization to use this picture. I need this picture to finish a project.
Could you direct me to the original picture, send me a link so I can contact the owner of it?
Seriously, I’m a photography student need this for my portfolio.

Veronica wrote on January 16, 2009 - 2:01 pm | Visit Link

I can send you a link where I got it from but it’s not from an ‘official’ source — just a site with pictures..

joshmax wrote on January 16, 2009 - 2:09 pm | Visit Link

Please, if you could I would really appreciate. You know my e-mail.

Veronica wrote on January 16, 2009 - 2:15 pm | Visit Link

hey, not sure if you could still help me, I have an lg cu400 I bought from ATT but now I moved overseas and dispite having a viable internet conection (tested using a nokia e63) I can not find a way to overrride the media net configuration and make this phone connecto to the local network (it was unlocked using a code ATT gave me)

Alvaro wrote on February 28, 2011 - 11:33 pm | Visit Link

wow, I thought this post was 2009 not 2007 geez!.

just to elaborate a little bit i saw one of your comments where you gave this info:

To connect via GPRS enter the following info:
Account name:
Password: CINGULAR1
Telephone: #99***1#

i want to chage this info with my current carrier one, but there is no way to edit, just to add a new one (which does not seem to work)

Alvaro wrote on February 28, 2011 - 11:44 pm | Visit Link

nevermind, I did it! i just found the proper parameters :)

Alvaro wrote on March 1, 2011 - 12:12 am | Visit Link
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