yashsingh1/xdaforums huggingface dataset:
[LG Optimus 2x] bydal:
It worked!!!!!!

Lot of thanks!!!!!!!!!!!

Enviado desde mi LG-P990 usando Tapatalk 2
[LG Optimus 2x] Shadowchaz:
Could you please put a step by step of what you did I just can't get hypertermnal to see phone :mad:
[LG Optimus 2x] Raum1807:
Great find, dcseek!! This will be useful for a lot of people. Maybe you should add that the IMEI number must be entered without dashes. It seems to be a common mistake. For example if your IMEI on the sticker is 123456-78-901234-5 then the command must be at%imei=123456789012345

Very good. This completes the guide for the ICS users.
[LG Optimus 2x] Pitscho:
i used the v28 CWM flashable STOCK frpm tonyp and harsh, but i can'*t enter the hiddenmenu. it just doesn't open.

Someone has an idea why?

is it possible to use putty instead of hyperterminal?

--------------------------------

someone in the v28g thread mentioned *#*#880#*#*, but that doens't seem to work niether

-------------

not even *#*#info#*#* works

------------

the v20 kdz files are not downloadable at the moment in the stock firmware thread, that all is ab big joke, i was so happy my cellphone will work again, but now it is just one thing after the other that doesn't work. damn.

some other ways to change the IMEI ?
[LG Optimus 2x] tonyp:
Awesome find dcseek, I will add this to the FAQ in my baseband thread.

@Pitscho: that's not a real Stock ROM. Easy as that. For the old partition layout just use a GB Stock ROM.
[LG Optimus 2x] Pitscho:
i thought of something like that and tried to get the rom from the STOCK FIRMWARE thread here, but all DLs aren't available at the moment.

do you have an link to a GB kdz file? i'm searhing at android-hilfe.de at the moment.
[LG Optimus 2x] dcseek:
thnx :fingers-crossed:
[LG Optimus 2x] wucinac:
wiil this work on DjangoManouche X 1.2 - 30a/b?
[LG Optimus 2x] bydal:
Yes, it work!!!!!!
[LG Optimus 2x] dcseek:
I used DM also. just i didn't know the new ics's code so i used an old trick to show hidden menu (i was using it with launcher pro) .

install holo launcher hd then on Home screen----> ADD shortcuts ---> choose Activities ----> select com.lge.hiddenmenu ---> hidden menu.

after this no code is needeed to access hidden menu, tap 'n go.
[LG Optimus 2x] wucinac:
Done:highfive:

thanks for this fix:good:
[LG Optimus 2x] liti15:
Cannot make work with hyperterminal could you guys upload a video because i dont understand anything :(
[LG Optimus 2x] Shadowchaz:
OK I have got this to work but phone shows unknown imei but is all working as it should.
[LG Optimus 2x] dcseek:
Hi i think that is not correct that is showing unknown IMEI, which rom are you using?

I would check again with hyperterminal with command at%imei which IMEI is on your device.

Normally you wouldn't be able to connect to gsm network without IMEI number.
[LG Optimus 2x] Shadowchaz:
I know its weird. I will check again maybe I mistyped it but I do have phone signal etc...

Edit although I had signal I could not send messages. Checked imei and it had not taken. I have reinputted by imei that is attached to my phone and this time its all fine.

I've gone back to cm10 on unlocked bootloader
[LG Optimus 2x] Ferrum Master:
Erase calibration???? You guys are weird....
[LG Optimus 2x] m0bster:
This is the most annoying bug in O2x! And this "meaningless thing" actually fixed it!

I have been searching for a solution for ages.

I think this deserves a sticky! :good:
[LG Optimus 2x] liti15:
Could you tell me how to do step by step because in the description isnt explained very well

---------- Post added at 12:38 AM ---------- Previous post was at 12:36 AM ----------

Could you tell everything step by step because in the description isnt explained very well
[LG Optimus 2x] m0bster:
Have you ever flashed a BB before?

If not check this first: http://xdaforums.com/showthread.php?t=1658047

What ROM do you have installed now?

If you can not figure out your IMEI first - check your battery compartment for a label.
[LG Optimus 2x] liti15:
Yes but i doesnt understand the hyperterminal what to do
[LG Optimus 2x] m0bster:
OK. You need any terminal program. I use putty, it is free, google it.

Do the hidden menu bit first.

Connect your phone to your pc.

Go to the device manager on you pc and find the new com port (LG Mobile port or something similar). Note: if you do not see a new com port you may be need to install drivers.

Notice the com port number (for me it was com17 for example)

Go to the terminal program (putty) and set it up for a connection on this com port number and baud rate 115200

Connect.

If you see the black screen it is ok.

Type AT and press Enter. If you see OK as an answer you are connected.

Now follow the instructions on writing your imei.

Important: you should see the message that imei has been written successfully at the end.

Hope this helps.

It is really fixed!!! I have not seen my phone connecting to 3G at work since I switched from CM7 nightlies!
[LG Optimus 2x] Pitscho:
It seems that my phone is finally fixed too.

After you change the IMEI to it's new value with the command at%imei=xxxxxx.. check the result with at%imei. The first set for me was incorrect, meaning the last two digits just weren't saved. I just reentered the command and the second try everything went fine.

I also used putty.

The hidden menu works with the CWM version off Firmware V20S also. I used that.
[LG Optimus 2x] orbital_71:
Rafabad, should add a proper guide on ur OP. So the community will benefit it. TKS
[LG Optimus 2x] dcseek:
You are right!

i have done research on technical papers and...

in this case for p990 seems that baseband files contains calibration data, but just for RX abd TX i presume that calibration data for other subsystems are not touched...

but further investigation is needed...
[LG Optimus 2x] m0bster:
I have noticed that after I erased the calibration data my phone had a slow gps fix first few hours.

But mobile 3G connection lock is almost instant now and there are minor speed improvements.

Also it seems like the mobile connection stability is a lot better now. I haven't seen any sudden signal disappearances for last few hours and I have seen a lot of them before, blaming the network operator of course :rolleyes:!

Auto-calibration kicked in I guess?
[LG Optimus 2x] Shadowchaz:
I agree. My phone has never felt so stable. Now WiFi and 3g have no problems and connection dropouts seem rarer. Gps signal locked fine.
[LG Optimus 2x] x_justin:
This calibration wiping works SO great! I dont know what to say!! My imei was totally gone, it contained mostly zeros, strange that it used to work with it anyway.. now after 10 hours on wifi, imediately the data connection comes up. I think it solves a hoge battery drain on mobile network when idle. At first i tried hyperterminal without wiping cal data, there came automatically lots of data throuhg the screen, it looked like logcat. After wiping cal data i only saw a blank screen on hyperterminal which remained blank.

Verstuurd van mijn LG-P990 met Tapatalk
[LG Optimus 2x] tetsuo55:
Finally got around to wiping cal too.

Was a pain one one of my two phones because flashing the baseband would error out, but after using the brick repair and then booting once it worked fine to flash afterward.

So far it seems to have solved all the problems i mentioned in this post: http://xdaforums.com/showpost.php?p=36176137&postcount=10
[LG Optimus 2x] dcseek:
Hi i resolved also my problems the worse one was that i was not able to close data connection when in roaming... I'm glad i helped you and others in this forum also.:D

Inviato dal mio LG-P990 con Tapatalk 2
[LG Optimus 2x] Grimlock42G1:
I just recognized that data partition is not wiped, when erase cal is selected. Normally data is wiped while flashing a bb via smartflash. Is ok that there was no wipe?

Thanks.
[LG Optimus 2x] Nova163:
What's the easiest way to get back to a stock rom?

I feel kind of retarded, because I didn't manage to flash any of the stock roms I found here.

EDIT: found the answer to my own question:

- easiest way is to download the .kdz file from LG servers (Google)

- search xda for the tool to extract CP and AB bins from the .kdz file

- flash bins using smartflash
[LG Optimus 2x] ToesNZ:
Any Cut by Jeff Hamilton is a good alternative to Holo Launcher to access hidden menu and create a permanent shortcut to it from your current launcher
[LG Optimus 2x] x_justin:
I used Django Manouche X to do it all. Just flash the zip of his rom (make sure you're on the new bootloader) and call 3845#*990#, go to port setting and select CP USB, do not reboot, do not check the checkbox, just that.

Should I make a guide for noobs for the FAQ section? I heared many people asking questions about how to use hyperterminal and I agree it's not that easy if you feel you can f*ck your phone with it. Allthough there's nothing to be affraid off.. I did a copy paste of my imei, something which hyperterminal can't deal with and my imei contained some star symbols, like 3772**8*---***, my internet and call connection still worked.

I think it's an easy procedure with a lot of work but it's worth it.

Why i think it's a lot of work? Because flashing a BB goes often wrong and we need promaq's full unbrick before flashing bb. After that we need a stock rom for CP usb connection. After that we need back the right bootloader and recovery for the right rom.

Before I make a guide, is there any unbrick NVflash stock rom? That's just enough to make it all work isn't it? Then you only need that one and the all in one toolkit to fix this problem. I think this cal wiping is worth it.

[edit] Found one.

Does anyone know if this rom is appropriate for flashing over any rom?

http://www.modaco.com/topic/335474-25-mar-nvflash-stock-rom-release-v10b-dated-1300166062-15032011/

It could be useful to solve two problems in one rom:

- Prevent Smartflash BB flash error near the end (promaq full brick repair does it too but then you have to flash a stock rom back after it)

- It's a stock rom, needed for this procedure
[LG Optimus 2x] orbital_71:
Yes a guide from u. Will benefit alots of ppl.
[LG Optimus 2x] x_justin:
Ok guys, since I love this solution so much, I made a guide to make it more accesible for everyone. It's definitely worth it, because I've a much better signal, less battery drain and on top of that the most important thing: data imediately after wifi! Here it is with all credits to dscreek offcourse:

http://xdaforums.com/showthread.php?p=36400520#post36400520
[LG Optimus 2x] tetsuo55:
I can now confirm that erasing cal also fixed my loss of data during calls.

I just made a call and the 2g icon remained on screen.
[LG Optimus 2x] louiscypherbr:
Are you saying that if you're in edge, your connection stays on during a call? And this was not possible before? So I think I have to clear my imei also, because my edge disconnects immediately when making a call. Also, if this doesn't happen anymore after you clear your imei, maybe we found a way to test if it's necessary to clear Cal or not, just fixing network to edge and making a call. If it disconnects, you should, if not, not necessary.
[LG Optimus 2x] tetsuo55:
thats exactly what i am saying.
[LG Optimus 2x] bitdomo:
For me the network bars sometimes froze. In this state my sim numbers are dissapier, and my phone doesn't show that I have incoming call. I can't make phone calls as well until I put my phone to Airplane mode then back to normal.

I give it a try by erasing CAL data maybe this problem disappier.
[LG Optimus 2x] x_justin:
Another common problem is a sim card problem. Simcard could be broken but it can also be useful to put two layers of tape on the backside, which makes the simcard thicker. I did it to, it fits in a more decent way in the sim card slot. I didn't notice improvements, but some users (a lot with HTC phones) use this as a fix for several problems.
[LG Optimus 2x] bitdomo:
This idea never would come into my mind :D. I will give it a try. Thank you.
[LG Optimus 2x] louiscypherbr:
Anybody else can confirm that edge connection stay on during a call after cleaning cal?
[LG Optimus 2x] bitdomo:
The only thing I noticed. I don' t lose my data network during calls. Before the erasing, whenever I made a call the network status bar changed to a G sign and showing I have no data network. There were no arrows. I used stock v20s in both situation.
[LG Optimus 2x] klappstuhl218:
For me the little E dissapears immediatly and the icon becomes grey. Works only with 3g/HSDPA.
[LG Optimus 2x] louiscypherbr:
Did you do the erase cal procedure?

Edit: nevermind, I saw at page 3 that you did it.

My phone behaves like yours, strange that for some people phone stay connected at 2g during calls.
[LG Optimus 2x] Nova163:
To be honest this sounds logical since 2G uses the same network calls do.
[LG Optimus 2x] gerniracing:
can be solved this problem with CM10 ROM?

Thanks!
[LG Optimus 2x] Grimlock42G1:
This fix works fine for me.
[LG Optimus 2x] Nova163:
It can be solved, but you have to use a stock rom to solve it.

However, some are reporting that just wiping CAL data solves the problems already (without setting the proper IMEI). If that's true, you wouldn't have to revert to stock at all, just flash a baseband while wiping CAL data.
[LG Optimus 2x] dcseek:
when i deleted Cal data i noticed also that i was connecting normally to my operator but i had an invalid IMEI but in case 2 persons has the same IMEI on the same operator the risk is that the operator will block that IMEI and both 2 will not be able to connect to gsm network.

Another full good reason is that changing IMEI is a crime all around the world (in many states at least) even if it is very unlikely that somebody will have imei checked by autorities.
[LG Optimus 2x] louiscypherbr:
Do not use random imei! You could block this number, on your phone and from somebody else; then you'll have your original number to use, but what about the other poor guy?
[LG Optimus 2x] bitdomo:
If you remove the simcard you until you change back your imei, then you may avoid the blocking of some else's phone.
[LG Optimus 2x] Nova163:
I haven't done that, but others in this thread have, I was just reporting about that.
[LG Optimus 2x] franky_z:
It worked!!! The problem is solved!!! Big thanks!!!
[LG Optimus 2x] R0B3RTF1SH3R:
problem not solved, using win 7. cannot type any text in hyperterminal. its just white. no keys get entered..

stuff with no imei atm, no bb or rom flash has fixed this. cannot make calls.

please help

ok this time i got it working. (fingers crossed)
[LG Optimus 2x] fundoosite:
For Windows 7 users. Hyperterminal

http://en.sourceforge.jp/projects/ttssh2/releases/
[LG Optimus 2x] stiaga:
Hi,

Yesterday i installed v30a BB clearing cal data as described in this topic but the issue doesn't go away, the phone disconnects itself from 3g network.

Now? What have I to do?

Try another BB?

Inviato dal mio Nexus 7 con Tapatalk 2
[LG Optimus 2x] k101d:
WORK for me with V30B baseband and rom :D now no need to toggle plane mode once I came out wifi area my O2X can switch to mobile data automatically.
[LG Optimus 2x] LarsPT:
Awesome, what a usefull finding!! Thanks a lot everyone!

PS: Why do you think this only happened when flashing a 4.2.1 (CM10.1) ROM?
[LG Optimus 2x] dcseek:
R: [DEV] Transition wifi/data

Hi this happened to me after flashing cm7 that time I thought was Rom related but after some tests I found out how is working O2X's baseband and I tried. I'm happy that my guide helped you.;)

Inviato dal mio LG-P990 con Tapatalk 2
[LG Optimus 2x] LarsPT:
Jesus... I have to wait 3 hours to download a flashable zip... is it still there not a way to do this without a stock rom? :(
[LG Optimus 2x] reccatyo:
You could use carburano's Djangomanouche X or any rom that is based on stock. It works for me.
[LG Optimus 2x] LarsPT:
Thanks... I lost 3 hours downloading a stock rom zip and I get installation aborted when I try to flash it... what a waste of time.

EDIT: Oh wait, I probably need the back to ext3 thingy...
[LG Optimus 2x] x_justin:
I made a picture based tut for this in q&a section including stefans nvflash stock based hybrid rom. That one fixes everything like ext3 automatically!

Verstuurd van mijn LG-P990 met Tapatalk
[LG Optimus 2x] Nova163:
Easiest way to revert to stock in the post above. Doesn't take three hours downloading unless you're on dial up
[LG Optimus 2x] LarsPT:
I ended up using DjangoManouche.

I followed all the steps correctly... but it still can't recover from airplane mode! :(
[LG Optimus 2x] SWTR:
Thank you so much! I thought my carrier is bad. But now everything is ok. Thanks, thanks, thanks!
[LG Optimus 2x] x_justin:
Tried another sim? Tried without sim? Did you just flash DM x? A real full wipe is also important, it isnt done by flashing a baseband neither by factory reset: mounts and storage>format system. Now you removed your rom so from now on its a real clean install.

Verstuurd van mijn LG-P990 met Tapatalk
[LG Optimus 2x] LarsPT:
Hi Justin!

Before I started, I removed SIM. I flashed BB with Erase CAL -> Lost IMEI. Wiped, format cache, dalvik, system AND internal SD card. Flashed Django, reverted IMEI, formated cache, dalvik and system, flashed temasek's V11 and kowalski 10.

That's all. Still doesn't recover from airplane.

Thanks!
[LG Optimus 2x] x_justin:
But you didn't format system apart from a wipe right? Nor flashing bb nor wipe data does that! You have to go to mounts and storage and format system and then flash a rom, dont know if that fixes it! Hope so.. is your imei looking right under settings?

Verstuurd van mijn LG-P990 met Tapatalk
[LG Optimus 2x] goodmamba:
I have some problems. In the hyperterminal window I can't type a thing.

It worked once and I managed to type the "at" command and I got an "OK" answer. But that was once and after that no more typing :(

I tried the classic winXP hyperterminal, Putty and Tera Term.

EDITED:

Problem solved by trying it on another computer.
[LG Optimus 2x] x_justin:
Hyperterminal can be really a *****, probably also firewall related! Good to hear you worked it out!

Verstuurd van mijn LG-P990 met Tapatalk
[LG Optimus 2x] LarsPT:
I mentioned several times that I formatted system as well.

IMEI got lost, and IMEI got restored again. I'm sure of that because I was having trouble restoring imei (I was forgetting the AT before %imei)

If I share a logcat will someone be able to help me?
[LG Optimus 2x] x_justin:
Ok, I didn't read that. Did you wipe your cal data again and did you flash your bb without getting errors about syncing? What do you see when you connect to hyper terminal, blank screen or data passing?

I cant analyse logcats but you can always post them!

Verstuurd van mijn LG-P990 met Tapatalk
[LG Optimus 2x] LarsPT:
I didn't try wiping CAL again... when I saw my IMEI was lost I thought I had followed the procedure correctly. You think I should try wiping CAL again?

With Hyperterminal I had a blank screen... but when I typed AT I got the OK return, and I managed to change back my IMEI, so I assumed everything was ok.

Thanks for trying to help nonetheless!
[LG Optimus 2x] x_justin:
If there went something wrong you might have changed something else, so you probably have to wipe it again! But if you make a nandroid backup, it's not so much effort is it? Just have a try, I personally don't have other suggestions, except for checking your sim in another phone just to be sure!
[LG Optimus 2x] tomsi91:
Finally, after year and half of hating this bug the problem is solved. After switch off wifi, mobile data turns on itself.
[LG Optimus 2x] reccatyo:
You should, that's the root of the problem based on the research by the finder of the solution (the erase cal). If you read the two source of this solution, they mentioned that the CAL data was giving wrong info so it needed to be wiped.

I tried not to wipe cal data first, and problems still happens, then after wiping cal, voila it's perfect. :D
[LG Optimus 2x] dcseek:
R: [DEV] Transition wifi/data

Which baseband are you flashing with smartflash? ROM?

Inviato dal mio LG-P990 con Tapatalk 2
[LG Optimus 2x] LarsPT:
Hi dcseek!

I have updated my signature:

Baseband 0521, ROM temasek V12, Kernel Kowalski 11

Thanks!

EDIT: To have access to the hidden menu I used DjangoManouche's 1.7.1 ROM.
[LG Optimus 2x] devangx5:
Hi LarsPT,

Just trying to help as I too had issues and this is the mistake I was doing...

Wondering if you are restarting your phone at least once after changing the IMEI... i. e. booting back to the Stock ROM. It may not work if you restart/boot into recovery and flash another ROM immediately.
[LG Optimus 2x] dcseek:
R: [DEV] Transition wifi/data

Try to flash 30a baseband and then normally without erase cal your favorite. I would also, like suggested, make some tests with DM after rebooting to check imei and connection switch between 3g and Wi-Fi. Then finally flash a custom ROM.

Inviato dal mio LG-P990 con Tapatalk 2
[LG Optimus 2x] LarsPT:
Will do!

Thanks to both of you! (dcseek I will press the thanks button once I can, as I reached my daily limit :p )
[LG Optimus 2x] LarsPT:
I'm going to give up guys...

I flashed DM again... reflashed BB with erase cal, lost IMEI, restored IMEI, rebooted with SIM card, tried airplane on/off... everything working perfectly. Recovery -> restore backed up temasek CM10.1 custom ROM, airplane on/off broken...

I tried to get a catlog but lumberjack is acting up... :( I think I'll just live with 2G/3G workaround until the bug is killed :(
[LG Optimus 2x] dcseek:
R: [DEV] Transition wifi/data

I never tried Cm 10.1 maybe the problem us with this rom. Try different kernels and roms

Inviato dal mio LG-P990 con Tapatalk 2
[LG Optimus 2x] tetsuo55:
Try doing a clean install without backup.
[LG Optimus 2x] dr4go:
As I've needed this today, I'll make a *bump* to this thread. :)
[LG Optimus 2x] xander59:
This is maybe a stupid question but the step 8 -> "Reset" is a Reboot or a factory reset in the hidden Menu ?

Thanks a lot :)
[HTC Sensation] oblikas:
Hello guys...I just get this phone a few weeks ago..I have S-OFF,OpenSensation2 ROM and it keeps losing signal for 1-2 minutes and then goes back...Same problem in all ROMs...Some help? Thanks.
[HTC Sensation] malybru:
Hi,

What does your bootloader say?

Is the phone brand new?

:)
[HTC Sensation] Skipjacks:
Does it lose signal when you're using it and holding it? Or does it lose signal when it's sitting by itself calmly on a table?

If it's losing signal while you're using it and touching it, it could be as simple as a loose antenae connection. Take off the back cover. See all those gold connectors? Those are the connections for the interal radios to teh antenae that's in the back cover. Take a tiny flat head screwdriver and lift all of them up on the back of the phone just a little bit, so they will press more firmly against teh back cover when you put it on.

Also, make sure you get this same loss of signal behavior everywhere, and not jus tin pne place. If it's just in pne place it's entirely possible that you have a dead spot in your house or office or whereever that your previous phone was simply strong enough to overcome. If you get this same loss of signal everywhere, then that's less likely.

If you lose signal while the phone is sitting still laying on the table....something more serious might be wrong. But messing with the antenae contac points won't hurt (unless you break one)
[HTC Sensation] malybru:
Hi,

That was why I was asking if it was a new phone.

BTW the radio antenna he wants to adjust are at the bottom of the phone.

:)
[Xperia Play Android Development] championswimmer:
TWRP has been updated please see here

http://xdaforums.com/showthread.php?t=2075562
[Xperia Play Android Development] wmaster4g:
Really cool!)

Happy New Year
[Xperia Play Android Development] ~iSamur@i:
wow, cool, i'm using TWRP on the nexus 7 and it is way better than CWM IMHO

you are already into the 2013? We Europeans not :)
[Xperia Play Android Development] Hardtron:
Backups don´t works for me...:(

CM10 FXP152
[Xperia Play Android Development] fma965:
more info needed
[Xperia Play Android Development] Hardtron:
Just does not work. I get fault message when starting the backup.

What information do you need?

CM10_FXP152/ .58 enhanced

SD 32Gb / FAT32-EXT4-SWAP