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(Resolved) Unable to connect to 3g with good APN, after flash

Hello all and thanks for your future help
So today i flash a friend's SGS, his phone run on SFR network (from france) with the DJP5 firmware with the combo fully fonctional.
So i flash a JM5, then the JS3 and i flash my rom kitchen from doc, custom JS3 with JPY modem and XEF CSC.
All is fine, the phone reboot, I flash speedmod Kernel k13a, reboot and set the good network and BAM.
Could not connect to 3g whatever i do.
I try different APN, then I reset to the first one (normaly the good one) but nothing.....
I try different modem (JPE, JPY and JPX) nothing work at all, i'm unable to connect 3g......
First time i see this problem, even if i flash my phone ten time a week.....
So I hope you could help me
Thanks in advance !

Nobody can help me? No idea?

I have the same kind of problem with mine. APN info is perfect. Settings are for GSM&WCDMA. I have no problem with WIFI and EDGE works fine so it'll still transfer data. It's with Darky's 9.2 ROM though so it may have something to do with the JS3 firmware customisations.
I've cleared cache and dalvik cache as well and I get the 3g symbol up for a moment but when it actually starts to transfer data, it switches to EDGE.
I'm re-flashing Darky's firmware without wipe just to see if it's an issue with my altering twframework.apk for a cool notification window background. I'll pop back on this one tomorrow and let you know how that went just to see if the first one was a bad flash. I have read that there can be more issues with flashing through CWM then through Odin but I think I'll wait and see if that's necessary.

hey i got kinda same problem..!!! :-| i have SGS i9000 in India...today i installed darky's ROM for the first time...installed 9.2 extreme version....but after that i just cant connect to a data network...not even Edge network.... if i update APN settings manually & reboot...still they are not saved...tried switching data network on & off million times also switching flight mode on & off....in hope that it will connect to my data network but just wont work..!!!

Have you all set the user names for the apn settings? I wasn't connecting either until I verified the usermame and password were correct.
Sent from my GT-I9000 using XDA App

Ok, here's the problem. It's the CSC. I know it bites but you're going to have to go through a system reset. The custom firmwares come with multi-csc (wipe versions) so enter your dial pad and type *#272*(your imei)# then select a CSC for your country or something like XEU which is what I did. Then, enter recovery, clear cache and dalvik cache. Finally, re-enter your APN.
Hope that does it for you. It worked for me as my CSC was XXOJPY (Darky's ROM) and set to KOR. I know I'll be keeping this in mind the next time I flash a new wipe ROM. Oh and do a backup beforehand, just in case.
If this helps, feel free to hit the thanks button

i always use the my region CSC.. my case the nordic one.. tried multi CSC but had various problems too..

obsessionXYZ said:
i always use the my region CSC.. my case the nordic one.. tried multi CSC but had various problems too..
Click to expand...
Click to collapse
There-in lies the problem. Generally it's a "set it and forget it" kind of thing but in the case of a rom that's going to wipe everything, you need to reset it.

Thanks for your reply! I
I've got all my apn 's settings right but I found a solution. The csc was multi and flash by the rom, so I flash and xef csc by odin and it works for me
Maybe it work for you
Thanks again for your help!

frostdream said:
Thanks for your reply! I
I've got all my apn 's settings right but I found a solution. The csc was multi and flash by the rom, so I flash and xef csc by odin and it works for me
Maybe it work for you
Thanks again for your help!
Click to expand...
Click to collapse
I have the same problem, Can you explain what you did step by step please, I'm new to this sorry.
thanks in advance.

[Q]Why can't I connect to O2? (Network connection issues)

I have an SGS that has been locked on the Three network since it was purchased. I unlocked it last night so it can be used on the O2 network, I also updated to the latest firmware via Kies (Baseband: I9000NEJP2, Build NEJP5).
When I put an O2 sim card in, it wont log on to the network, yet the same sim in a DHD works fine.
I have put a T-Mobile sim in the SGS and it works fine.
I have gone into Settings>Wireless+Network>Monile network settings>Netwqork operators, and tried to select O2 manually but I get the error: 'Unable to Connect. Try later.'. Then I get a message in my task bar: 'No service - Selected network (O2 - UK) unavailable.
Any ideas?

Just a guess really the 3UK firmware upgrade has blocked O2 Possible a wrong CSC in the firmware .
Could flash a CSC via Rom Kitchin Update Zip.
The CPW csc connects to O2 ( i am on O2/GiffGaff )
http://romkitchen.org/
jje

JJEgan said:
Just a guess really the 3UK firmware upgrade has blocked O2 Possible a wrong CSC in the firmware .
Could flash a CSC via Rom Kitchin Update Zip.
The CPW csc connects to O2 ( i am on O2/GiffGaff )
http://romkitchen.org/
jje
Click to expand...
Click to collapse
Its weird that they would only block O2 though.
Anyone else experienced this?

JJEgan said:
Just a guess really the 3UK firmware upgrade has blocked O2 Possible a wrong CSC in the firmware .
Could flash a CSC via Rom Kitchin Update Zip.
The CPW csc connects to O2 ( i am on O2/GiffGaff )
http://romkitchen.org/
jje
Click to expand...
Click to collapse
Could I do this without modifying the phone at all?
I was going to put a custom ROM on the phone, but after reading up about a few things, I cant activate the downloading/update mode using the buttons on my phone, and after reading that a few people have bricked theirs using the miniusb hack i decided against it

Rom Kitchin requires recovery boot option .
jje

JJEgan said:
Rom Kitchin requires recovery boot option .
jje
Click to expand...
Click to collapse
Could i flash a CSC and nothing else? Or do I have to flash a different ROM as well? How would you suggest i get the recovery boot option?

Through Rom Kitchin update zip with just a CSC in it .
http://forum.xda-developers.com/showthread.php?t=817703
jje

my solution
http://forum.xda-developers.com/showpost.php?p=25509654&postcount=279

3 is great on android. Unlimited data for 15 a month? Head on over to 3 if you can't get o2 working.
Trolled from my GT-I9000 using XDA

[Q] ROM upgrade problems

I just upgraded from the official optus 2.2 JP5 (i think) to the JVK 2.3.3 (its european) and the rom itself is working perfectly I can call text but can't get a data connection even when roaming is turned on. I also have a 3g symbol up the top which is weird because it's saying i have connection. YES i have selected my APN again when i flashed the rom with odin i didn't flash the CSC and PHONE is this why? i thought they were just for if you live in europe. thanks

yeah i know there are some compatibility issues when you just flash PDA if it doesnt already have a modem and CSC. Its best to just reflash JVK with the modem and csc from JP5 if you dont want to change.
But check your APN setting to see if its correct. I upgraded my brothers phone and I noticed the APN setting was incorrect (was set to internet instead of yesinternet).
http://ausdroid.net/apns/

dopeee said:
yeah i know there are some compatibility issues when you just flash PDA if it doesnt already have a modem and CSC. Its best to just reflash JVK with the modem and csc from JP5 if you dont want to change.
But check your APN setting to see if its correct. I upgraded my brothers phone and I noticed the APN setting was incorrect (was set to internet instead of yesinternet).
http://ausdroid.net/apns/
Click to expand...
Click to collapse
So far it's working THANKYOU SO MUCH!

Highly Challenging Network Issue

I've had this samsung galaxy ace s5830i (my first android) for 4 of the most frustrating months now.
The problem first started with the phone being stuck on EDGE regardless of signal strength. I tried flashing it with new roms but had zero success. I tried manipulating the menu under *#197328640# but that led to a dead end as well. Every time I tried to select WCDMA only, the network bar changes to a "circle and cross" type of thing. I tried to dial *#7465625# to check for network locks but everything reads off i.e. no locks of any kind. Finally, I tried to select a new radio band by dialing *#4636# but that operation crashes a "com.android.phone" everytime.
So in summation, service mode changes don't help and flashing the rom doesn't help.
Recently, I to switched one of the strongest networks available (other than the one I'm on) but the phone is stuck on "emergency calls only" mode. When I try a manual network search and select the network to which the SIM card belongs, I get and error telling me that the SIM card can't register onto the network.
I have used these SIM cards on nokia phones and other samsung galaxy ace devices and have experienced none of the problems listed above, even in remote areas. The support guys of my network say nothing is wrong with my account.
So there you have it. Is there anything left that I can try?

Flash the latest firmware available for your region in Odin. Because this will wipe and reinstall your modem and other data as well as your ROM. If that doesn't do it then it must be a hardware problem, isn't it under warranty?
By the way just to rule this out, check you haven't lost your IMEI number with *#06# as this can also cause network access issues.
Sent from my GT-S5830i using xda app-developers app

makeyourself said:
Flash the latest firmware available for your region in Odin. Because this will wipe and reinstall your modem and other data as well as your ROM. If that doesn't do it then it must be a hardware problem, isn't it under warranty?
By the way just to rule this out, check you haven't lost your IMEI number with *#06# as this can also cause network access issues.
Sent from my GT-S5830i using xda app-developers app
Click to expand...
Click to collapse
The IMEI ok. What section of the operating system controls the com.android.phone process or the phone's ability to select or switch bands? In my lay man understanding, this is where the issue lies and every time I flash, this region remains unchanged

Try changing manually CSC of the ROM.That's the most reasonable thing that I can thing of right now...if it don't work after changing it go to samsung service..

ickyyy said:
Try changing manually CSC of the ROM.That's the most reasonable thing that I can thing of right now...if it don't work after changing it go to samsung service..
Click to expand...
Click to collapse
If you mean the *#272*IMEI# trick, then I already tried that and samsung has no presence in my country so no service centre to speak of

I have your exact same problem .
and I've been looking for a solution since last week , i'm starting to think its a hardware problem.

I "worked around" it by flashing the phone with a rom that locked the device and then reflashing it with the original rom. At least now it picks network but the other problems haven't left i.e. still no 3G and I can't edit any menu under service mode et al.
On another note, if you have the time, try flashing with different modems... maybe a miracle will happen

There seems to be something wrong with basebands of latest stock roms.Try switching aeroplane mode on and then off.I regularly lose signal..and get stuck without signal until I reboot.
Sent from my GT-S5830i using xda app-developers app

Make sure of your phone model (Under the battery) because there is GT-S5830M GT-S5830C and GT-S5830I.
In my case, I have GT-S5830M and the only modem that worked for me is PHONE_S5830CVJKL4.tar.md5.
Maybea changing the modem will fix your network problem.

Styrke said:
Make sure of your phone model (Under the battery) because there is GT-S5830M GT-S5830C and GT-S5830I.
In my case, I have GT-S5830M and the only modem that worked for me is PHONE_S5830CVJKL4.tar.md5.
Maybea changing the modem will fix your network problem.
Click to expand...
Click to collapse
Care to share the link to that file?

XIItribes said:
Care to share the link to that file?
Click to expand...
Click to collapse
Here:[How To] fix GT-S5830M No Network After Flash

I flashed 5830c's ROM but it didn't work for me as my device is 5830m .
I found 5830 Rom the problem is its a one package ROM and its not supported by Odin
now I'm looking for a multi-package 5830m ROM

Osa21345 said:
I flashed 5830c's ROM but it didn't work for me as my device is 5830m .
I found 5830 Rom the problem is its a one package ROM and its not supported by Odin
now I'm looking for a multi-package 5830m ROM
Click to expand...
Click to collapse
just use odin3 v3.07. just search on general thread

Osa21345 said:
I flashed 5830c's ROM but it didn't work for me as my device is 5830m .
I found 5830 Rom the problem is its a one package ROM and its not supported by Odin
now I'm looking for a multi-package 5830m ROM
Click to expand...
Click to collapse
PDA of GT-S5830C won't work on GT-S5830M Flash only GT-S5830C Bootloader/Modem and GT-S5830i pda.

Osa21345 said:
I flashed 5830c's ROM but it didn't work for me as my device is 5830m .
I found 5830 Rom the problem is its a one package ROM and its not supported by Odin
now I'm looking for a multi-package 5830m ROM
Click to expand...
Click to collapse
You can use a file called Odinatrix (found somewhere here on xda) to split single firmware files into pda, modem and csc. I, on the other hand, still get a circle and cross whenever I set the device to wcdma only. The interesting thing is that setting it on auto picks up 3g but very rarely (twice in many months) and for a short time (like 3 minutes). still looking for answers

Singals issue

I have an unlocked rooted galaxy s3 i9305 LTE Jelly bean 4.1.2, my problem is this when ever i restart my phone it won't detect network signals automatically it shows a round bar on the place signals bar, after turning off and on the flight mode it shows the singals its also detect the signals if use an app called Network singnal refresher available in play store manually, if go to settings, about, status its shows my mobile network carrier name but under My phone Number it doesnt show my number, and ERI verison not available but IMEI number is there, i have also tried different active SIMs but nothing worked,
I did factory reset wiped catches patitions changed rom tried custom roms stock rom downgraded to 4.1.1 changed the SIM nothing work, still having the same problem have to refresh signals to get my phone work i have set on lte/gsm/wcdma auto mode gsm only no success
other informations
Model i9305 lte internations version
baseband i9305XXBLK4
build number jzo54 i9305xxblk5
All the developers pleaseee help me out

Factory reset first step .
jje

JJEgan said:
Factory reset first step .
jje
Click to expand...
Click to collapse
I tired all these steps nothing worked
help needed

Usual
Check IMEI is correct same as under the battery .
Check Sim try another sim .
Flash correct modem and csc for network .
Flash stock rom for your network .
Next step is a service centre .
jje

JJEgan said:
Usual
Check IMEI is correct same as under the battery .
Check Sim try another sim .
Flash correct modem and csc for network .
Flash stock rom for your network .
Next step is a service centre .
jje
Click to expand...
Click to collapse
thanks for response
yes IMEI is correct and i have tried different SIMs too but one thing is confusing me how to find the correct modem and csc for my phone i dont know much about android, samsung didnt officially launched this phone in my country, can u help to get the correct stock rom ?

Shashan said:
thanks for response
yes IMEI is correct and i have tried different SIMs too but one thing is confusing me how to find the correct modem and csc for my phone i dont know much about android, samsung didnt officially launched this phone in my country, can u help to get the correct stock rom ?
Click to expand...
Click to collapse
Regarding the modem, I found a link for you:
http://forum.xda-developers.com/showthread.php?t=2010116
These modems are all CWM flashable .zips
You say your country isn't officially supported?
It would help to know which country that is.
Good luck though!

Valdorous said:
Regarding the modem, I found a link for you:
http://forum.xda-developers.com/showthread.php?t=2010116
These modems are all CWM flashable .zips
You say your country isn't officially supported?
It would help to know which country that is.
Good luck though!
Click to expand...
Click to collapse
thanks for reply
I dont think it could be modem problem i have flashed another modem it couldn't fix the probem i am from pakistan, it was working perfactly when i bought the phone but by mistake i flashed a wrong rom that damaged the IMEI and baseband both were null/null and unknown then i flashed a modem i recovered IMEI and baseband, which ever i9305 lte stock rom i flashed it doesnt automatically installed the modem i have to flash modem seperately, it also doesnt stick on GSM only when i reboot it automatically switch to lte/gsm/wcdma auto mode that doesn't detect the network until i refresh the signals by turning on and off flight mode

A guess based upon the last reply .
Your EFS folder is wrong or damaged .
Suggest you flash the correct stock firmware that came with the phone .
http://forum.xda-developers.com/showthread.php?t=1978840
jje

JJEgan said:
A guess based upon the last reply .
Your EFS folder is wrong or damaged .
Suggest you flash the correct stock firmware that came with the phone .
http://forum.xda-developers.com/showthread.php?t=1978840
jje
Click to expand...
Click to collapse
GT-i9305 does not support initialising

Read the IMEI post in I9305 development .
No help then you require a service centre .
By EFS i meant whatever folder holds that data on I9305 .
jje