Database Users

Galaxy S - no signal

After factory data reset phone can't see GSM network and can't register. It says NO SERVICE. SIM card ok. check at another phone. What can be a problem and how to fix it?
Some info below:
fw: 2.1update1
baseband i9000xxjf5
kernel 2.6.29
build ECLAIR.XWJF7
csc i9000serjf2
p code: gt-i9000hkxbri

Have you checked your APN settings?

I can't make even phone call. APN...What to check in particular? wifi and gps are working fine. tried service mode... it says signal strength 0db.

My wifes is the same way it cant lock on a service provider after factory restore only way it works is with a custom rom cant figure it out

Contact your network and enter mobile network settings manually .
jje

flash to custom rom maybe?

it's your APN settings
just google your APN settings... i.e. i'm with Bell mobility... if I google Bell APN I will find the info I need... that data goes into settings>wireless>mobile networks>access point names
hit the menu button and add apn.... bell's examples are here http://androidforums.com/samsung-i7500/87145-bell-mobility-apn.html
they are carrier specific obviously

Hi All,
This happened to me before and I was as frustrated as you and when I was about to give up, I tried one last restoration, but only this time I did it correctly. After that, I restored 5 different versions of Samsung Galaxy S stock ROM back to my Samsung Galaxy S. One of these versions were Chinese, and everything was in Chinese.
Samsung Galaxy S had no signal was because the modem file was missing while you were performing the restoration.
Now, all you have to do is go to this page and follow the instructions to restore the Stock ROM back to your Samsung Galaxy S.

You can try to install a different rom just in case. I had the same problem and i tried to fix it applying different modems but that wouldnt work so i ended flashing cyanogenmod and back to another custom rom and that did the trick.
Even flashing back to the latest official rom for my country and operator.
Tapatalk

[HELP]Unknown base band

Hello it seems i have an unknown baseband and my apn settings have disappeared
I was performing a routine nandroid backup (Using TWRP recovery)
when i rebooted my apn settings were gone as well as my baseband
[Q] my question is do i just input the apn setting manually and the baseband will appear? or do i just fastboot to stock images to get back the baseband?
any ideas as to why my apn settings disappeared so i can avoid this situation in the future

IRemixI said:
Hello it seems i have an unknown baseband and my apn settings have disappeared
I was performing a routine nandroid backup (Using TWRP recovery)
when i rebooted my apn settings were gone as well as my baseband
[Q] my question is do i just input the apn setting manually and the baseband will appear? or do i just fastboot to stock images to get back the baseband?
any ideas as to why my apn settings disappeared so i can avoid this situation in the future
Click to expand...
Click to collapse
Just reflash the radio you we`re using with TWRP, download from here http://forum.xda-developers.com/showthread.php?t=2087227. You might have to add the apn settings manualy.

Thanks that fixed it :good:

[Q] MIUI v.3 Data Problem

Hi, Just installed this ROM using the recommended kernel (percy_g2's CM#2). I've search for a bug related to data connections but seems It's only me. SIM card recognizes my provider and I can make/receive calls and sms, but using the data plan it's impossible, showing it's disconnected. Checked and unchecked the roaming option and still doesn't work. What are my options?

Reset apn settings to default or manually enter them - your provider can send you the settings
Phone settings
click more or wireless and network settings
Mobile networks
access point names
press menu button on phone
reset to default
Check the apn settings are present & correct for your provider or enter them manually

marcussmith2626 said:
Reset apn settings to default or manually enter them - your provider can send you the settings
Phone settings
click more or wireless and network settings
Mobile networks
access point names
press menu button on phone
reset to default
Check the apn settings are present & correct for your provider or enter them manually
Click to expand...
Click to collapse
Did it and didn't work. As far as I recall, in all other roms I have installed I never changed settings ain APNs, they were empty all the time. The phone automatically gets the connection to the carrier. It was all about enable or disable data.
I called my provider but they say the network itself should recognize you inmediatly.
I just flashed stock and it's working there but not in MIUI.

memop3 said:
Did it and didn't work. As far as I recall, in all other roms I have installed I never changed settings ain APNs, they were empty all the time. The phone automatically gets the connection to the carrier. It was all about enable or disable data.
I called my provider but they say the network itself should recognize you inmediatly.
I just flashed stock and it's working there but not in MIUI.
Click to expand...
Click to collapse
Iv always had my providers access point in my apn settings but may be different for others
The only other thing you can do is try a different stock rom firmware baseband
you can do this by flashing a different stock rom firmware via odin to what you are currently using
See dokys thread at top of dev section for a list of pre done flashable odin firmware or make your own with any latest firmware from sammobile.com using the splitter tool

marcussmith2626 said:
Iv always had my providers access point in my apn settings but may be different for others
The only other thing you can do is try a different stock rom firmware baseband
you can do this by flashing a different stock rom firmware via odin to what you are currently using
See dokys thread at top of dev section for a list of pre done flashable odin firmware or make your own with any latest firmware from sammobile.com using the splitter tool
Click to expand...
Click to collapse
Could flashing a different Percy kernel may work?

HELP I broke my LTE

First off I'm using an unlocked S5 on straight talk's LTE network, have been for about 9 months with no problems. I've talked to support twice and they reactivated networks and all that good stuff, and when none of that worked sent me a new sim, which I have just activated and it still didn't fix my problem - so I'm finally bringing my issue here.
Last week I decided to update from phoenix rom oc4 (I think it was oc4) to optimal rom og5 (15-5). Anyway I was hasty in flashing and messed up, so just went back to stock ncg > root > full wipe > flash firmware, rom, kernel, firmware again just to be safe. The rom works fine except I seem to have lost my data connection. The 4G icon still shows, but it's not filled in - as you can see in the screenshots. To make it even more strange, when I check the network and sim card in apps like Advance Signal Status and Sim Manager, I still seem to be getting a connection to 4G but there is just no data flowing. The only error I can see is in phone info, when I run a ping test, I get PingIpAddr: Fail: IP addr not reachable which you can also see in the screenshots. It would appear this is my problem but I don't know where to go from here. I'm going to start flashing different versions of modems, starting with oc4 to see if that helps. Then I'll probably try different roms, but I've flashed other roms trying to fix this and even restored the backup to when it worked and it still didn't fix my problem. Did I wipe my IP address or something maybe? I am in CDMA/LTE mode, and the vzwinternet apn is selected.

For starters try to put the apn settings for your carrier and if not sure call them and ask them to email you the setting

I fixed it, went back to stock ncg instead of ni2 and that worked. Weird.

Suddenly no signal in any rom

Hello, yesterday I was trying latest Lineageos16 by @codeworkx and was trying the network options. I selected "GMS/WCDMA/LTE" and since then I cant get any network like if my RIL was broken or something. I tried:
Rebooting the phone
Put airplane mode
Installing 20s firmware again (previously it was already installed)
Coming back to LOS15
Installing a stock rom via fastboot
And the problem is still there, my sim is detected in all roms but I cant get any signal. I need help since I don´t know what to do now.

Gadrok said:
Hello, yesterday I was trying latest Lineageos16 by @codeworkx and was trying the network options. I selected "GMS/WCDMA/LTE" and since then I cant get any network like if my RIL was broken or something. I tried:
Rebooting the phone
Put airplane mode
Installing 20s firmware again (previously it was already installed)
Coming back to LOS15
Installing a stock rom via fastboot
And the problem is still there, my sim is detected in all roms but I cant get any signal. I need help since I don´t know what to do now.
Click to expand...
Click to collapse
I got your PM. But, I don't know which phone you have. As a last resort you can flash my recovery or flash the EFS from my old X727 ( if you have an X727 or X720)
There are several things things that could cause this issue, so I have provided several things to try
If you have tried several Roms, I am betting that you probably wiped but did not format your storage?
FYI Encryption can cause these kinds of issues. I have seen these issues caused by Google as well, and once the account has been restored the sim card will start working again.
Follow the very basic steps below and if that doesn't work, you can try last resort steps that are more drastic and could cause the issue to become unrecoverable. So avoid doing things such as wiping your modems etc. or flashing alternate efs files until you have exhausted all of the possible ways to repair.
Dial *#*#4636#*#* in the dialer
Navigate to Device/Phone Information
Click on “Run Ping Test “
After the Ping test is performed
Click on “Turn Off Radio“
Next, Click on “Turn on SMS over IMS“
No Changes Next >
First try changing to global and then check and make sure that the correct APN is selected under Network&Internet> Mobile Network> Advanced > Preferred Network Type > Choose Global
Next go to Network&Internet> Mobile Network> Advanced >Access Point Names > Choose your correct Network. > If your APN is not listed, enter it manually, click save, then choose new entry.
Go to Network&Internet> Mobile Network> System Select > Should be Automatic
Go to Network&Internet> Mobile Network> CDMA subscription > Should be RUIM/SIM
Check for Signal : If no signal install program from play store called Network Discovery, read instructions and follow suggestions. Usually this program alone will resolve these types of issues ( the free version works fine)
If it does not work Remove the Sim > Wipe sim card off with lint free cloth , ensure that there is no damage to the sim card, Now Reboot > Should work.
No Changes Next >
Start Clean, including formatting storage ( Not WIPE!) Format type yes, Reboot to Recovery then do a full clean wipe.
Reinstall Rom, Gapps, Root > Take out the sim card and setup the phone, Reboot to Recovery, Reinsert Sim card, and boot to system, Open Playstore check for updates.
No Changes Next >
Trying flashing my EFS files from here:
https://forum.xda-developers.com/showpost.php?p=75021582 See Section titled EFS.
If that doe's not work try restoring the recovery, its efs is from a phone that I returned to Amazon. ( so its an alternate EFS)
Last resort
I am not going to tell you this one yet because it can cause a permanent problem. Try everything that I listed above it all else fails you can try the most drastic steps. Which could finally solve your issues but also make the issue worse in a worst case scenario.

tsongming said:
I got your PM. But, I don't know which phone you have. As a last resort you can flash my recovery or flash the EFS from my old X727 ( if you have an X727 or X720)
There are several things things that could cause this issue, so I have provided several things to try
If you have tried several Roms, I am betting that you probably wiped but did not format your storage?
FYI Encryption can cause these kinds of issues. I have seen these issues caused by Google as well, and once the account has been restored the sim card will start working again.
Follow the very basic steps below and if that doesn't work, you can try last resort steps that are more drastic and could cause the issue to become unrecoverable. So avoid doing things such as wiping your modems etc. or flashing alternate efs files until you have exhausted all of the possible ways to repair.
Dial *#*#4636#*#* in the dialer
Navigate to Device/Phone Information
Click on “Run Ping Test “
After the Ping test is performed
Click on “Turn Off Radio“
Next, Click on “Turn on SMS over IMS“
No Changes Next >
First try changing to global and then check and make sure that the correct APN is selected under Network&Internet> Mobile Network> Advanced > Preferred Network Type > Choose Global
Next go to Network&Internet> Mobile Network> Advanced >Access Point Names > Choose your correct Network. > If your APN is not listed, enter it manually, click save, then choose new entry.
Go to Network&Internet> Mobile Network> System Select > Should be Automatic
Go to Network&Internet> Mobile Network> CDMA subscription > Should be RUIM/SIM
Check for Signal : If no signal install program from play store called Network Discovery, read instructions and follow suggestions. Usually this program alone will resolve these types of issues ( the free version works fine)
If it does not work Remove the Sim > Wipe sim card off with lint free cloth , ensure that there is no damage to the sim card, Now Reboot > Should work.
No Changes Next >
Start Clean, including formatting storage ( Not WIPE!) Format type yes, Reboot to Recovery then do a full clean wipe.
Reinstall Rom, Gapps, Root > Take out the sim card and setup the phone, Reboot to Recovery, Reinsert Sim card, and boot to system, Open Playstore check for updates.
No Changes Next >
Trying flashing my EFS files from here:
https://forum.xda-developers.com/showpost.php?p=75021582 See Section titled EFS.
If that doe's not work try restoring the recovery, its efs is from a phone that I returned to Amazon. ( so its an alternate EFS)
Last resort
I am not going to tell you this one yet because it can cause a permanent problem. Try everything that I listed above it all else fails you can try the most drastic steps. Which could finally solve your issues but also make the issue worse in a worst case scenario.
Click to expand...
Click to collapse
Ok, first of all thanks for that deatailed guide. Unfortunately I sadly need the last resort and how to do it.

Gadrok said:
Ok, first of all thanks for that deatailed guide. Unfortunately I sadly need the last resort and how to do it.
Click to expand...
Click to collapse
Seriously ?
Okay, here is my two second answer : Use QPST
Edit:
Basically at your risk delete your modems via adb
First make sure that you have your own efs backup by using TWRP > Backup. Next wipe your modems
Boot into fastboot
1. adb reboot bootloader
2. fastboot erase modemst1
3. fastboot erase modemst2
4. fastboot erase cache
5. fastboot reboot ( Check for signal in system > if no go to link below.
You didn't spend anytime telling me about what phone you have, what you have actually tried etc.. I don't have time or the motivation to write easy to understand step by steps.
Thankfully someone has provided the steps already:
1. Use Chrome Browser on your desktop with the Google Translate extension installed and activated.
2. Follow the instruction listed on 4PDA here: http://4pda.ru/forum/index.php?showtopic=876414&view=findpost&p=72854643

Edit 2
You could also just wait for next Lineage update. Although, I am not experiencing any issues apparently other people are dealing with issues also. The next update may solve it. If possible wait before doing the drastic steps mentioned above.
Sent from my LEX727 using XDA Labs

@tsongming Currently I am experiencing almost the same problem. I just bought Le Pro3 US version (x727) a couple weeks ago. It came with US 18s firmware if I am not mistaken. Then I upgraded to Chinese firmware 26s, unlocked the boot loader and installed TWRP. So now I have the x720 baseband. After that I played around with several ROM, AICP 14.0 and LOS 16.0 without any problem.
Two days ago I installed LOS 16.0 4 March nightly build. Everything mostly work and I got LTE connection. Suddenly yesterday morning, when I was at home I noticed the phone just has H+. Restarting the phone didn't help. So I just went to office using train. In the train, I realized it changed back to LTE. I played with the phone and suddenly it changed back to H+. So I changed the setting to LTE only but it didn't help. Restarting the phone also didn't help. So currently my phone stuck with H+.
I have tried several things:
1. Flash the x720 firmware
2. Flash AICP 14.0 official
3. Reformat internal storage and full wipe other partitions as you mentioned above and flash LOS 16.0 5 march nightly
All failed to solve the problem.
Currently I am thinking to flash the original 26S Chinese version back. In your opinion, will it help?