[Q] Cannot connect to network - Galaxy S II Q&A, Help & Troubleshooting

I have what appear to be three identical SGS2 phones, which I have brought on holiday to Thailand. Two of them can connect here using local SIM cards, but one cannot. Upon investigation, it appears that that phone is unable to see all of the local networks. The other two can see 6 networks, the odd one can only see 2 of them.
All are running MIUIScotland 2.6.15 (previously known as Galnet) and all are using the same (default) modem.
Is it possible that either
a) The odd one is a different model? I have checked, they all report to be I9100 (not G or some other variant) and are all working with the same ROM which I downloaded just before leaving.
b) The odd one has some CSC or modem package which the MIUIScotland rom did not flash over, and that is causing the problem. If this is a possibility, what's the best way to completely reflash *everything*, to get to a known good starting point.
Any other theories or things I can try?
Thanks guys,
- Naz.

mrnaz said:
I have what appear to be three identical SGS2 phones, which I have brought on holiday to Thailand. Two of them can connect here using local SIM cards, but one cannot. Upon investigation, it appears that that phone is unable to see all of the local networks. The other two can see 6 networks, the odd one can only see 2 of them.
All are running MIUIScotland 2.6.15 (previously known as Galnet) and all are using the same (default) modem.
Is it possible that either
a) The odd one is a different model? I have checked, they all report to be I9100 (not G or some other variant) and are all working with the same ROM which I downloaded just before leaving.
b) The odd one has some CSC or modem package which the MIUIScotland rom did not flash over, and that is causing the problem. If this is a possibility, what's the best way to completely reflash *everything*, to get to a known good starting point.
Any other theories or things I can try?
Thanks guys,
- Naz.
Click to expand...
Click to collapse
i also think that the CSc not installing properly is creating the issue.
u can try reflashing the rom once again and check
and a odd way out is to make a bkp of the rom from one of the phones thats wrk'ng fine and try installing that bkp on the phone with the issue and see

I have already reflashed the ROM, but that didn't work. Are there any CSC packages that can be installed as CWM zip files that are known to be good? If so, where could I find them. Google returned nothing but noise.

Related

Bell SGS2 3G Data Connectivity Issues

Ok so I've been reading around in a few threads about this but haven't quite found a solution in my case and I think I need a second opinion. I've also posted in other on going threads but it just gets lost in the rabble so.... it now gets it's own thread.
Bought a brand new Bell SGS2 from a dude on Kijiji. It was brand new, still in the box with the plastic all on it. I SIM unlocked it (which required rooting it) and dropped my Rogers SIM chip in.
I can send/receive txt's but 3G data drops frequently and usually happens once I initiate a data session. My test case uses SpeedTest. I've only seen it complete a full test cycle twice... most of the time, it will get the ping, start the download test and 10% in, the data connection drops and 3G/H+ icon disappears. It takes about 1-2 mins for the data connection to return. I've tried market access or web browsing and same thing happens once a data session initiates.
I've installed a slew of modem/ROM combinations via Odin from XXKH3 to XXKI4... nothing... same issue. Seemed worse with KI4 too!
I've tried different APN settings, disabling fast dormancy and specifically trying to enable only HSPA bands. Nothing. Same problem.
I've since reverted back to stock BELL firmware and tried a friends Bell SIM chip and noticed THE SAME thing happening! So this would definitely tell me it's a hardware problem. It's been more than 15 days so Bell won't even talk to me as the return period has passed and I'm not a bell user so screw them.
I guess at this point, I should test my luck with Samsung but it's been rooted and even though I've un-rooted the binary counter shows 2 which means.... I'm screwed for warranty right?
U can reset the binary counter after flashing back to it original state by using jig. Google for galaxy s2 jig
Btw, why dont u just flash original samsung I9100XXKI3 rom? Which provide good modem. Check my signature, 'boot loop', theres a link lead u to installation guide with download link provided. All is there.
Sent from my GT-I9100 using xda premium
I personally found XXKI3 Modem to be best for Bell's SGS2 (currently using it on Telus).
Tried all the modems' including KI3... didn't work.
In recovery mode, fix permission, reboot and check the 3g again.
Try another method, flash cm7 nightly latest version #16. If the problem still exist, thats mean its related to phone's hardware.
Sent from my GT-I9100 using xda premium
neobirdrio said:
In recovery mode, fix permission, reboot and check the 3g again.
Try another method, flash cm7 nightly latest version #16. If the problem still exist, thats mean its related to phone's hardware.
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
Well I got it new out of the box but I had to SIM unlock it which required rooting and etc....
I did power-volume up-home... got into recovery mode and... there is no option to fix permissions. Keep in mind this is the stock ROM I put back on.
CM7 is another idea.... not against that.
Well. Maybe some failure occured during rooting your phone before. Install rommanager app from the market, open then select flash recovery mode, then select your phone model.. This will give u recovery v4 which will give u more option on recovery mode. This is the easiest way to get more option cwm. U will have fix permission option when u done.
Sent from my GT-I9100 using xda premium
i have the same problem i.e data loses connection. after a fresh flash of stock rom and factory reset , it starts working fine for a week or so and then the shyt happens again . i can tell u , its not a hardware issue, it more like a software issue.
i m not good at android but wen i used to run squid on a linux machine as a proxy server , i recall i had to clear a log file to make data flow possible every few days. i think android has a similar issues some logs files build up or some **** like that.

Using Cyanogenmod and lost access to mobile data (3g)? Read here and reply.

Fixing mobile data (3g) after installing Cyanogenmod 7 (nightly)
Hello all. I'm writing this as a long-time lurker and custom ROM / kernel user, who has been helped along greatly by this forum.
I had a long-standing issue that I couldn't find any clarity on: my mobile data access didn't work after switching to custom Roms/Kernels from LG's original Froyo Rom.
After months of thinking it was just an odd bug, and something to live with (since I rarely use data), I decided to look a little deeper into the problem. I found it difficult to even find information on the problem - there's a lot of bad information, and a lot of hard-to-read information from friendly, but not perfectly fluent English speakers.
In short, I'm hoping that others who are struggling with this issue will find this post with some Googling, and won't have to be as confused as I was.
After doing the following, I have everything working perfectly and here's how I did it:
1) I knew that the right baseband (under About Phone, in Settings) had something to do with mobile connections, including 3g data authentication and transfer. I found that v10 (and older) basebands are considered the 'old' baseband, while v20 basebands are considered 'new' basebands.
2) Cyanogenmod often reports the baseband incorrectly, so finding out what baseband you're on is unreliable through the About Phone menu, if you're already on CM7.
3) There are some scary sounding techniques to update your baseband (one involves using a poorly documented program called 'LGMDP-v1.5.exe'). These techniques can apparently brick your phone, so I avoided them. I might be wrong on some of the details here, so let me know!
4) I instead obtained the latest baseband by simply letting the LG update software (in my case from LG.ca) update my phone to Android 2.3. I noticed that I now had baseband v20. My mobile data worked!
5) I then re-rooted the phone, using SuperOneClick.
6) Installed the latest CM7 nightly. Mobile data no longer worked
6.5) I should mention, I tried other ROM/Kernel combinations and ended up having crashes and hangs on boot - thankfully I could use 'adb reboot recovery' to get back to Clockwork Recovery, when even holding various keys on reboot to do this didn't work).
7) Installed the wonderful ta-gb 1.1 kernel (thanks to all of the devs who worked on this and others like it).
8) And lastly (and possibly most importantly) I came across this:
https://github.com/CyanogenMod/andr...gingerbread/prebuilt/common/etc/apns-conf.xml
It's a list of APN information, which corresponds to different carriers, and appears to be necessary for mobile data connections. My carrier (Koodo) was not listed here, and therefore appears to not be included in even the latest Cyanogenmod 7 (as of Feb 2012).
9) This led me to find this: http://code.google.com/p/cyanogenmod/wiki/APNlist
Which happened to include the APN information for my carrier that I needed to put in, under Mobile Networks > Access Point Names.
Inputting that information made my 3g connection start up instantly. I was able to check that things looked good by typing *#*#4636#*#* in the dialer, and looking under Phone Information.
Maybe you're a veteran CM7 user, and think this is obvious newb stuff, but I want to leave this thread here for any other users who were stuck as long as I was.
If you fixed this issue with a different method, please share what you did here. If you're a ROM/Kernel dev with more insight on anything that I covered, please comment.
Cheers.
Are you doing this on v20 baseband?
I also have trouble with data on nightly's. I know DJ posted on the cyanogen forum today, saying Adam got a new Sim (128k, the ones causing problems) for testing. There should be a fix soon, fixing this problem.
Sent from my LG-P500 using Tapatalk
Paulenski said:
Are you doing this on v20 baseband?
Click to expand...
Click to collapse
Yes. Is your carrier's APN information available to try all that I wrote above?
bambu85 said:
Fixing mobile data (3g) after installing Cyanogenmod 7 (nightly)
Hello all. I'm writing this as a long-time lurker and custom ROM / kernel user, who has been helped along greatly by this forum.
I had a long-standing issue that I couldn't find any clarity on: my mobile data access didn't work after switching to custom Roms/Kernels from LG's original Froyo Rom.
After months of thinking it was just an odd bug, and something to live with (since I rarely use data), I decided to look a little deeper into the problem. I found it difficult to even find information on the problem - there's a lot of bad information, and a lot of hard-to-read information from friendly, but not perfectly fluent English speakers.
In short, I'm hoping that others who are struggling with this issue will find this post with some Googling, and won't have to be as confused as I was.
After doing the following, I have everything working perfectly and here's how I did it:
1) I knew that the right baseband (under About Phone, in Settings) had something to do with mobile connections, including 3g data authentication and transfer. I found that v10 (and older) basebands are considered the 'old' baseband, while v20 basebands are considered 'new' basebands.
2) Cyanogenmod often reports the baseband incorrectly, so finding out what baseband you're on is unreliable through the About Phone menu, if you're already on CM7.
3) There are some scary sounding techniques to update your baseband (one involves using a poorly documented program called 'LGMDP-v1.5.exe'). These techniques can apparently brick your phone, so I avoided them. I might be wrong on some of the details here, so let me know!
4) I instead obtained the latest baseband by simply letting the LG update software (in my case from LG.ca) update my phone to Android 2.3. I noticed that I now had baseband v20. My mobile data worked!
5) I then re-rooted the phone, using SuperOneClick.
6) Installed the latest CM7 nightly. Mobile data no longer worked
6.5) I should mention, I tried other ROM/Kernel combinations and ended up having crashes and hangs on boot - thankfully I could use 'adb reboot recovery' to get back to Clockwork Recovery, when even holding various keys on reboot to do this didn't work).
7) Installed the wonderful ta-gb 1.1 kernel (thanks to all of the devs who worked on this and others like it).
8) And lastly (and possibly most importantly) I came across this:
https://github.com/CyanogenMod/andr...gingerbread/prebuilt/common/etc/apns-conf.xml
It's a list of APN information, which corresponds to different carriers, and appears to be necessary for mobile data connections. My carrier (Koodo) was not listed here, and therefore appears to not be included in even the latest Cyanogenmod 7 (as of Feb 2012).
9) This led me to find this: http://code.google.com/p/cyanogenmod/wiki/APNlist
Which happened to include the APN information for my carrier that I needed to put in, under Mobile Networks > Access Point Names.
Inputting that information made my 3g connection start up instantly. I was able to check that things looked good by typing *#*#4636#*#* in the dialer, and looking under Phone Information.
Maybe you're a veteran CM7 user, and think this is obvious newb stuff, but I want to leave this thread here for any other users who were stuck as long as I was.
If you fixed this issue with a different method, please share what you did here. If you're a ROM/Kernel dev with more insight on anything that I covered, please comment.
Cheers.
Click to expand...
Click to collapse
You should be able to get all your apn information from your carrier provider even if cyanogenmod doesnt have it.
Apn is nothing to do with being a veteran cm user or that, you used to always have to enter that kind of stuff in the old phones when you used g and 3g, in my case my carrier would sms me the settigs automatically, such as it still does for my nokia e63
deniso177 said:
You should be able to get all your apn information from your carrier provider even if cyanogenmod doesnt have it.
Apn is nothing to do with being a veteran cm user or that, you used to always have to enter that kind of stuff in the old phones when you used g and 3g, in my case my carrier would sms me the settigs automatically, such as it still does for my nokia e63
Click to expand...
Click to collapse
Good to know!
I have installed the nightlyfoure v3.8 and I am not getting 3g.I am getting edge connection. When I activate 3g it shows I have only gprs. I live in a place where 3g is available and I have v20g baseband.
Can you also tell us the procedure to edit/overwrite the original apns-config.xml if you did so? Thank you dude
geoemm said:
I have installed the nightlyfoure v3.8 and I am not getting 3g.I am getting edge connection. When I activate 3g it shows I have only gprs. I live in a place where 3g is available and I have v20g baseband.
Click to expand...
Click to collapse
Is your carrier listed in either of the links I posted about in step 8 or 9?
TheBlackHawkJr said:
Can you also tell us the procedure to edit/overwrite the original apns-config.xml if you did so? Thank you dude
Click to expand...
Click to collapse
I didn't edit 'apns-conf.xml', but I did find my carrier information in the link I posted in step 9) and typed it in manually into Access Point Names.
I suppose you could edit the apns-conf.xml file either in the source code, and compile CM7 yourself (time consuming). Or you could use the adb program that comes with the Android developer kit, and shell into the rooted phone (to see it, do: adb shell; cd /etc; ls). You could then probably edit it in place (might be risky), or pull the file, edit it, and then push it back with various adb commands that you can google
The code.google.com link I posted above might be the best way to request your APN details get added to the file in the next CM7 release.
bambu85 said:
I didn't edit 'apns-conf.xml', but I did find my carrier information in the link I posted in step 9) and typed it in manually into Access Point Names.
I suppose you could edit the apns-conf.xml file either in the source code, and compile CM7 yourself (time consuming). Or you could use the adb program that comes with the Android developer kit, and shell into the rooted phone (to see it, do: adb shell; cd /etc; ls). You could then probably edit it in place (might be risky), or pull the file, edit it, and then push it back with various adb commands that you can google
The code.google.com link I posted above might be the best way to request your APN details get added to the file in the next CM7 release.
Click to expand...
Click to collapse
Perfect, thanks but wait wait wait! You also faced the "not able to save APNs" problem? Also, I've just found out that my carrier (Vodafone IT) is listed among other carriers in APNlist you've linked... what's the deal?
(please be patient with me dude, I might seem really dumb but... I'm learning as I go )
My provider's APN is already added.
But sometimes, it fails to connect to DATA let it be 2G/3G.
Reboot solves it....
TheBlackHawkJr said:
Perfect, thanks but wait wait wait! You also faced the "not able to save APNs" problem? Also, I've just found out that my carrier (Vodafone IT) is listed among other carriers in APNlist you've linked... what's the deal?
(please be patient with me dude, I might seem really dumb but... I'm learning as I go )
Click to expand...
Click to collapse
Same issue.. pushed the updated apn-conf.xml to /etc but in my settings where the apns should show up do not. I also can not save the apn when i manually input it. (tmobile)
TheBlackHawkJr said:
Perfect, thanks but wait wait wait! You also faced the "not able to save APNs" problem?
Click to expand...
Click to collapse
I did not encounter this problem. Does anyone else have any input on this issue?
Thank you bambu85 I was stuck in the same situation for the longest time. I am using oxygen mod and your post helped me greatly. Data is now working! Sure the information might already be there but for us koodoers it's not so easy to decipher. Thanks
bambu85 said:
I did not encounter this problem. Does anyone else have any input on this issue?
Click to expand...
Click to collapse
Plus one when putting in the apn manually and press save it does not save it I only had this problem with new baseband ROMs
Sent from my HTC sensation 4g using Tapatalk

Factory firmware + setup & not registered on network

Hi!
I have this common problem: not registered on network.
Wifi other stuff ok, simcard ok, phone is independent.
I cant start phonecalls after a while, or the connection is lost while a call.
Same issue before and after the fw update, current is: 4.1.2
Can u give me hints what to do?
I already did a factory reset either.
Maybe a factory firmware could help.
Thanks
rigo88 said:
Hi!
I have this common problem: not registered on network.
Wifi other stuff ok, simcard ok, phone is independent.
I cant start phonecalls after a while, or the connection is lost while a call.
Same issue before and after the fw update, current is: 4.1.2
Can u give me hints what to do?
I already did a factory reset either.
Maybe a factory firmware could help.
Thanks
Click to expand...
Click to collapse
either try a stock rom
either change the modem
wishmas7er said:
either try a stock rom
either change the modem
Click to expand...
Click to collapse
i wouldnt like to download some mess. can u please give me a link?
change the modem u mean the hardware?
No,modem is software. There's several threads on this forum,search "gti9100 modems" (edit:stumbled across it while browsing http://forum.xda-developers.com/showthread.php?t=1640812 ) It might be that you need to manually add your APN settings. If you go into settings-more-mobile networks-network operators is your networks name there and checked?
Sent from my GT-I9100 using xda premium
scissors_cut_paper said:
No,modem is software. There's several threads on this forum,search "gti9100 modems" (edit:stumbled across it while browsing http://forum.xda-developers.com/showthread.php?t=1640812 ) It might be that you need to manually add your APN settings. If you go into settings-more-mobile networks-network operators is your networks name there and checked?
Sent from my GT-I9100 using xda premium
Click to expand...
Click to collapse
thanks for the help, i better read after. meanwhile happens that wifi connection is lost but i dont recognise it just have to turn the wifi off and on.
if i turn on flight mode than off the not registered **** is gone either.
what to do in this case?
If the WiFi connection keeps dropping, try using a static IP in the connection settings rather than DHCP. If that doesn't work, try flashing a different kernel (drivers could be messed up, and they're in the kernel, not the modem).
Re: trying different modems, start with the modems bundled with stock roms released by your carrier, then try modems bundled with stock roms released by other carriers in your country if those don't work. This should save you some time rather than just flashing modems from other carriers in other parts of the world (you only do that if trying the modems from your carrier/other carriers in your country don't work).
MistahBungle said:
If the WiFi connection keeps dropping, try using a static IP in the connection settings rather than DHCP. If that doesn't work, try flashing a different kernel (drivers could be messed up, and they're in the kernel, not the modem).
Re: trying different modems, start with the modems bundled with stock roms released by your carrier, then try modems bundled with stock roms released by other carriers in your country if those don't work. This should save you some time rather than just flashing modems from other carriers in other parts of the world (you only do that if trying the modems from your carrier/other carriers in your country don't work).
Click to expand...
Click to collapse
the static ip wouldnt work for me, cause i use different network classes at home and at my work.
im trully sorry but i dont know how to try different modem. could you please advise in a few words?
is there a topic how to try a different kernel either?
thanks a lot
If your phone is rooted, you can flash modems quickly/easily in CWRecovery. Do a search (XDA or Google) for 'I9100 modems' & you should get plenty of threads (I don't have any links handy, and if I gave you links I'd have to search to find them just as I've suggested, which you're capable of doing yourself.
If your phone isn't rooted, there are Odin flashable modems, but I very much recommend you root your phone if that's the case & use CWM flashable versions.
Can't offer any other suggestions re: the WiFi issue given you say you've tried factory resets/etc beyond trying some custom kernels (and maybe even other stock roms); using different WiFi networks is problematic for you given you won't be able to look at much on the WiFi modem/router side (like changing settings or updating firmware) given the networks concerned aren't your home network.
Re: exactly how to flash kernels/roms/modems, you really need to do some searching, this stuff has been covered so many times here over the past two years. There's some threads stickied at the top of Q&A and General which should have all the info you need, if not, an XDA search will pull up threads which will have the info you need.
well i wanted to un-brand the phone and i found an article with firmware and modem and another file (kernel i guess) together so i did the steps with odin and the error is gone.
however i had to upgrade 2-3 times cause the fw+modem came with an old 1.xy android what was slow as hell.
anyway thanks for the help
best regards.
r

No WiFi networks show up, but I can connect to WiFi

Hello. I'm on 4.4.2, using Trent's ROM.
I'm having an issue where I can connect to WiFi, but no new networks show up after scans. I've been told here to flash "toltevzw_mj9_official_firmware.tar," but I have two issues: (1) I realized that I'm a dumb ass and posted on the wrong thread (that's not Trent's ROM), and am thus worried that the fix wouldn't work on Trent's ROM; (2) I can't find a working link of that .tar file.
I don't mind continuing to look for the file, but is flashing that likely to fix my issue, even on a different ROM? On Alliance, scanning for WiFi networks worked just fine.

Wifi won't turn on & shows No SIM card

This has be happening to me the last couple days. I've done no changes to the software, I did a screen replacement a few weeks ago. Sometimes Wifi will turn on after a while or the SIM card will read and connect to LTE. Trying to decide if the phone is on its last legs or not. I'm on BareCee ROM, have always only used engine95's modified ROMs. Tried flashing the latest modem and the latest partitions if any changes. Also tried deleting the /data/misc/wifi/ folder as suggested in another thread stating a similar SIM issue with no luck.
Can you fix that?
Kyusaku said:
This has be happening to me the last couple days. I've done no changes to the software, I did a screen replacement a few weeks ago. Sometimes Wifi will turn on after a while or the SIM card will read and connect to LTE. Trying to decide if the phone is on its last legs or not. I'm on BareCee ROM, have always only used engine95's modified ROMs. Tried flashing the latest modem and the latest partitions if any changes. Also tried deleting the /data/misc/wifi/ folder as suggested in another thread stating a similar SIM issue with no luck.
Click to expand...
Click to collapse
Hi, please tell me if you fixed that problem, I have exactly the same problem right now with my D851 T-Mobile, at first the phone says no sim card, but the sim works with other phones, and I use the phone with wi-fi but since yesterday the wi-fi won't turn on, I did the most common steps, did a restore wiping all my personal data and apps, and installing the original firmware. And nothing happens.

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