Database Develop

[Q] PROBLEM - Unstable signal after flashing Updated Stock ROM

Yes friends, I'm really in trouble my OB. Two days ago, I flashed a patched ROM to get my phone rooted through the smartflash method. Everything went OK, but short time after, I realized that my 3G/GSM signal was completly unstable.
The phone gets the signal but only for a while. Then, it loose it. Can't call, can't receive, no 3G. Full disaster!!!
So, since two days ago I'm eating every LG forum trying to find the solution, but it's impossible, no way, I'm about to throw my phone through the window.
So, pleeeaaase, could anyone help me???
From my forum lectures I could imagine that is anything involving baseband, or perhaps some network config in the service menu "3845#*970#".
My spanish network works in GSM900/1800 and WCDMA2100
I've tried to flash several STOCK firmwares with the same result: no luck.
Please, any help will be apreciated.
Thanks

wilmeta said:
Yes friends, I'm really in trouble my OB. Two days ago, I flashed a patched ROM to get my phone rooted through the smartflash method. Everything went OK, but short time after, I realized that my 3G/GSM signal was completly unstable.
The phone gets the signal but only for a while. Then, it loose it. Can't call, can't receive, no 3G. Full disaster!!!
So, since two days ago I'm eating every LG forum trying to find the solution, but it's impossible, no way, I'm about to throw my phone through the window.
So, pleeeaaase, could anyone help me???
From my forum lectures I could imagine that is anything involving baseband, or perhaps some network config in the service menu "3845#*970#".
My spanish network works in GSM900/1800 and WCDMA2100
I've tried to flash several STOCK firmwares with the same result: no luck.
Please, any help will be apreciated.
Thanks
Click to expand...
Click to collapse
First of all Question belong to Q&A section...
try a stock based custom rom like zeus, marvel or supressed or a non-stock AOSP like CM7... maybe is a hardware malfunction...

First of all, sorry about the wrong section I posted this thread, and thanks for the reply.
I don't think it's a hardware issue, because the phone was Ok before updating to a new firmware.
Anyway, after work I'll try to flash a custom ROM if no one gives me a better idea.
I'll post the result, but please, I still accept suggestions in order to solve this problem using a stock firmware.
I also have mesuared gps strenght signal with an android app, and it detects around 25%-30% where another phone with same carrier detects 75%.
Thanks, and keep in need of new ideas.
Sorry for any written mistake. My english is not as good as I wish. :·(

If you tried several roms like Zeus, and noone have solute your issue, than you should assume, that you have a hardware problem. Of course you should compare the signal strength with an other Smartphone, due their format cause a bad signal reception.
Go back to stock. I recomend this: http://forum.xda-developers.com/showpost.php?p=18946763&postcount=1
and here pick your corresponding stock:
http://lg-phone-firmware.com/index.php?id_mod=1
other thing: In which country are you using the phone, and it is buyed there? Maybe bad bandwithspecs.
Regards!

Thanks Pacos1, the phone is being used in Spain, and also it's been bought there. (weird to write you in English :·)).
I still haven't tried a custom ROM like zeus or another one. I wanted to solve the issue with any Stock ROM, but as I have been trying several with no luck, I think it's time to try a custom one. I'm thinking about Zeus.
But first, as you've mentioned bad bandwith specs, I remember that the problem came after installing a patched stock ROM from russia. Once installed, I found out that spanish language wasn't included, so I returned to a patched stock spanish ROM. At that moment I started to have signal unstability.
So, I ask you with hope, do you know something I can do to restore spanish bandwith specs, and how to do it??
That would save my ass, as I'm really touched with this trouble.
Thanks again and hope a good end to this embarassing stuff.

I'm going to give up and call the SAT center. I've tried a lot of things for the last days without luck and no more ideas come to my brain.
I've tried Zeus ROM, it's quite good and nice, good performance, but still unstable signal. I've return to an offical ROM through LG update service and again unstability.
My conclussion is that is something about RIL and baseband, but don't have enough knowledge to solve it, then it's time to ask for official help and prepare my wallet (phone is out of warranty :·( )
End of the story.
Thanks

try to install a different version of roms custom or stocks. for example form what i know v20o roms are from spain and the v20n roms are for europe use. try some different version and you may able to find the answer to your problem

[Q] 3g, and wireless problem on my P990

Hi guys,
Because of the performance issues 10 days ago I decided to install custom rom so first I rooted my phone. After that I found the installing custom rom is diffucult (because I am noob) so decided not to do it.( i really didnt do anything except rooting).
2days ago because of performance issues again, I decided to reset my phone to factory settings by the option in the settings. During the prosses phone reseted itself and stayed at lg logo( light and lg logo came and went continiously). So i gave my phone to technical servise and they fixed it. (probably reinstalled the system).
But now I have problem with 3g and wireless. For example, wireless and 3g is switched off in settings but I still have internet connection( so stupid) and when i try to connect my wireless connection at home it fails until i open 3g. After opening 3g, it connects wireless and shows signal strength of wireless but after closing 3g, it doesnt show signal strength.
Does any of you experienced such problem and know the solution ???? Help me please.
Thanks a lot in advance.
Android Version: 2.3.4
Kernel: 2.6.32.9
baseband: 1035.21_20110622
LGE version: LGP990-V20a
(after factory reset, no update)

Hi, I never had this problem. My suggestion is to root the phone and try to flash a new rom. Search "Django Manouche 1.2 Renaissance", based on stock kernel v20q Gingerbread 2.3.4. I try it for a long time and i think is a very fast and stable rom. For install a rom you need tp flash a custom recovery. In XDA forum there are many posts that explain this. I hope to check out was helpful

[Q] Network Fail (read a lot of forums, still no answer)

Hi guys
I own a Lg Optimus 2x P990 and I am currently running the JB CM10 Build by tonyp.
In the past I ran ICS builds like Django Manouche and other cm10 builds like Paranoid Android.
The cm10, builds are running very well on my device but there is a possible bug ... I use my phone during the day, and if I send, receive messages I usualy keep my connection with the mobile network.
When I wake up (phone is inactive for several houres) , and I just unlock my phone, the network bar is full, but I can't send or receive messages. When I go into Settings and try to search for a network I get " Error while searching for network ". A simple reboot can fix this problem.
If I don't use my phone often during the day, It does the same. I unlock after a few houres, statusbar Icon is full, but no network available... (so if someone tried to reach me by calling or texting, I can only see it after a reboot.)
The second thing is that I always have R above the network signal, even when I am not roaming at all ...
I tried to change my baseband when I was on Paranoid Android, but that didn't work ...
There is NO problem with my mobile network on the ICS build (like django manouche) , but the ROM isn't fast enough and I like stock android more ... ( I think)
I always did a full wipe, and followed the instructions ... I am on the latest Kowalski Kernel at the moment...
If I erase internal memery, could that do something?
Thanks for your time.
Arthur

?
That is strange. I am running cm 10.1 too and I have sometimes problems with logging in to operator after reboot. But your problem seems bigger. Did you tried to turn on/off mobile data (dont know how it's in english version)? And try to change to 2G/3G, maybe that might solve something. Or maybe there is an bug in new Bootloader (if you ran django mandouche and tonyp's), so if that doesnt help to you, try to downgrade to old BL

Reply
DeeKay773 said:
That is strange. I am running cm 10.1 too and I have sometimes problems with logging in to operator after reboot. But your problem seems bigger. Did you tried to turn on/off mobile data (dont know how it's in english version)? And try to change to 2G/3G, maybe that might solve something. Or maybe there is an bug in new Bootloader (if you ran django mandouche and tonyp's), so if that doesnt help to you, try to downgrade to old BL
Click to expand...
Click to collapse
Thanks for the reply ! My phone came with the old bootloader, and I installed Nova HD CM9 on it and had the same problem.
I need to try the 2g/3g settings...
When the error occures, I can try to turn data on/off all I want .. only a reboot helps ...
Django is on the new bootloader, and worked fine ... So I believe it's a CM problem... ?
I also dialed *#*#4636#*#* and changed to WCMDA Preferred (but didn't help)
Any more advice ?

APN - check it!
also.
try different base band.
try 30b

Reply
R0B3RTF1SH3R said:
APN - check it!
also.
try different base band.
try 30b
Click to expand...
Click to collapse
My apn seems fine ... altough here in Belgium we have a weird situation ... I am on operator B (telenet) wich uses the network (the infrastructure) of operator A (mobistar) ...
I'll try that baseband!
Thanks for the reply!

Reply
arthurderyckere said:
My apn seems fine ... altough here in Belgium we have a weird situation ... I am on operator B (telenet) wich uses the network (the infrastructure) of operator A (mobistar) ...
I'll try that baseband!
Thanks for the reply!
Click to expand...
Click to collapse
I tried to change the APN, or add a APN but when I try to save it, it's not in the list ...
So I changed back to default ...

testing
I just followed this guide .. I let you know If it worked for me ..
http://forum.xda-developers.com/showthread.php?t=2087215

Not working
arthurderyckere said:
I just followed this guide .. I let you know If it worked for me ..
http://forum.xda-developers.com/showthread.php?t=2087215
Click to expand...
Click to collapse
Still having this same problem over and over ... have to reboot my phone every morning ...
anyone ?
Thanks

I also have this problem, tried every possible combination of baseband and ril, still couldn't solve it.
Ended up returning to v30b ICS, where the problem doesn't occur.

[Q] ICS Lost sinal and +00000000 phone number

Hi guys,
I already have some experience in changing ROM, and so on.
Recently, I gave up the experimental ROMs that have always worked well for back to cyanogem stable 7.2.
The first week was very good, but in one afternoon, for no apparent reason, my signal disappeared. The smartphone settings showed me that my number was +0000000000, the imei was shown correctly, but for some reason imei_sv was unknown. Put other roms, but the problem persisted. So I decided to go back to the stock ROM, I lost my root and CWM. Surprisingly, at first, I could make a call and receive another. But after the excitement, the same problem again.
Sometimes, the settings show my number correctly, others turn to show +000000000 ...
Nevertheless, the display shows me a good sign, and the phone recognizes messages in my mailbox.
* Detail: I can not in any way put CWM. I spent the whole day trying, and absolutely all the methods that the internet gives me do not work.
UPDATE: Finally now I have CWM, but the problems are present.
Rom: European stock v30a - Android 4.0.4
Baseband version: 1035.21_20121130
If someone can help me, would be very grateful!

fla_viny said:
Hi guys,
I already have some experience in changing ROM, and so on.
Recently, I gave up the experimental ROMs that have always worked well for back to cyanogem stable 7.2.
The first week was very good, but in one afternoon, for no apparent reason, my signal disappeared. The smartphone settings showed me that my number was +0000000000, the imei was shown correctly, but for some reason imei_sv was unknown. Put other roms, but the problem persisted. So I decided to go back to the stock ROM, I lost my root and CWM. Surprisingly, at first, I could make a call and receive another. But after the excitement, the same problem again.
Sometimes, the settings show my number correctly, others turn to show +000000000 ...
Nevertheless, the display shows me a good sign, and the phone recognizes messages in my mailbox.
* Detail: I can not in any way put CWM. I spent the whole day trying, and absolutely all the methods that the internet gives me do not work.
Rom: European stock v30a - Android 4.0.4
Baseband version: 1035.21_20121130
If someone can help me, would be very grateful!
Click to expand...
Click to collapse
same problem here, im having trouble with my signal. Please Help Us. Thank You

araltea1 said:
same problem here, im having trouble with my signal. Please Help Us. Thank You
Click to expand...
Click to collapse
Very strange...You are tried to erase Cal Data and restore your imei??? posibly Cal data is being corrupted...
sorry for my english

MD500 said:
Very strange...You are tried to erase Cal Data and restore your imei??? posibly Cal data is being corrupted...
sorry for my english
Click to expand...
Click to collapse
I did not do this procedure. But I turned it into a brick, and formated all partitions and redid them with a fantastic tool here forum, All-In-One Toolkit -> http://forum.xda-developers.com/showthread.php? t = 2020737. This procedure can, by itself, restore a corrupted imei or delete data cal?
If not, how could I do this? And because it is corrupt without any procedure? I was at home and no apparent reason the phone lost signal. At 13:00 he had signal, and at 14:00 had no more.
I considered another possibility: virus in sim card.
This test will only be able to do tomorrow, using a sim card that is not "infected", if that would be the problem.
UPDATE: Today I bought a new sim card and tested it with the stock rom newly formatted. I had the same problem, but strangely, the first few minutes of use, everything works. After a few minutes of use, the signal sim no longer works, and after a few hours, the smartphone connects on a rece wifi, but the signal does not stabilize: connects but does not have internet access.
REALLY DO NOT IDEA HOW TO SOLVE THIS!
I really need help!

fla_viny said:
I did not do this procedure. But I turned it into a brick, and formated all partitions and redid them with a fantastic tool here forum, All-In-One Toolkit -> http://forum.xda-developers.com/showthread.php? t = 2020737. This procedure can, by itself, restore a corrupted imei or delete data cal?
If not, how could I do this? And because it is corrupt without any procedure? I was at home and no apparent reason the phone lost signal. At 13:00 he had signal, and at 14:00 had no more.
I considered another possibility: virus in sim card.
This test will only be able to do tomorrow, using a sim card that is not "infected", if that would be the problem.
UPDATE: Today I bought a new sim card and tested it with the stock rom newly formatted. I had the same problem, but strangely, the first few minutes of use, everything works. After a few minutes of use, the signal sim no longer works, and after a few hours, the smartphone connects on a rece wifi, but the signal does not stabilize: connects but does not have internet access.
REALLY DO NOT IDEA HOW TO SOLVE THIS!
I really need help!
Click to expand...
Click to collapse
You really should try Erase CAL data. http://forum.xda-developers.com/showthread.php?t=2087215&highlight=wifi the first Post what you need. If you having problems with restoring your imei then use putty instead of hyperterminal

I did not do this procedure, but deleted all the partitions and redid them, and I believe it made the signal back. Thank you all for the help!
UPDATE: The problem is present again! I restored Imei, erased CAL data, change billions of basebands and no sucess. If I search for networks, it´s fix, but only any minuts, and the problem returns again. I have sucess for any days, but the sms were frequently lost, and after, my signal losts completly. It´s a possible hardware problem?
I really need professional help of my friends of XDA.

You are tried to erase cal data again by smartflash using 30B Rom and Baseband 30B?you o2x is from china or korea?
Enviado desde mi LG-P990 usando Tapatalk 2,and sorry my english
---------- Post added at 03:29 AM ---------- Previous post was at 03:17 AM ----------
If doesnt work, Try flashing Stock ICS 30B and Baseband 30B from nvflash...if doesnt work,try changing you imei from other(valid and open),but its ilegal(i don't going to write procedure to make this -sorry!-)
Enviado desde mi LG-P990 usando Tapatalk 2

[Q] Mobile network crisis after flash

So, I'm having some issues regarding my recently flashed XSP C5302.
Model: C5302
Android Version: 4.3
Baseband version: 8960A-AAAAATAZQ-40031007-18
Build number: 12.1.A.1.201
I'm on locked BL.
Thing is, I flashed it as soon as I got my hands on it due to that annoying flickering screen, tried to downgrade it to 4.2.1. It was the first time I did that, so I went through many tuts to get it right.
At first I flashed a .254 rom, and when I entered the About screen, model had switched to C5303. What I did was follow DoomLord's guide to root it, instal CWR and flashed a deodexed .254 rom for C5302(this one: http://forum.xda-developers.com/showthread.php?t=2423625). Everything back to normal.
But then I noticed my mobile data wasn't working, so I thought it may have been fault of the deodexed rom. Sooo, I upgraded it AGAIN to 4.3 using PC Companion, just to find out that the mobile issue was not having the APN correctly configured. Sigh.
And well, I'm now stuck again on 4.3, but at least my mobile data package is working. However, it's extremely slow. I mean, I can see the H and H+ icon, but even on H+ it takes ages to send messages and connect. At first I wondered if the baseband had anything to do with it, but when I flashed the rom I checked everything but Kernel and System, so...
So my question is, is it possible that I did something that "damaged" my mobile data connectivity? If so, could somebody please suggest any solution? I must say, my service provider sucks, so it could be their problem too, and I'm just here crying over spilled milk with no reason at all.
Thanks in advance!

Probably your service provider - I must have tried 100's of custom roms and whilst some have meant that data didn't work, this was caused by buggy software, never damage to the phone.

Parkside said:
Probably your service provider - I must have tried 100's of custom roms and whilst some have meant that data didn't work, this was caused by buggy software, never damage to the phone.
Click to expand...
Click to collapse
Yes, I'm pretty sure too, but oh I was so damn worried! Thanks