[Q] Got no network connection on samsung t679 - Samsung Galaxy Exhibit 4G

Hi all,
I bought my Samsung Exhibit 4G (t679 ) as new, unlocked. It came with ROM UVLG1. After I inserted my local (Russia) SIM - I got 2G (EDGE) only working. So then trying to understand why 3G does not work - I followed suggestions here(http://forum.xda-developers.com/showthread.php?p=22412278) - to change network Band range using Debug mode.
After few unsuccessful attempts to change Band type from CDMA to GSM .. I got No Network connectivity at all.
Note, wifi is still working fine, but No GSM connection.. Tried to reinstall different ROMs (Peach Sunrise, Galaxy Exhibition) at this link http://forum.xda-developers.com/wiki/Samsung_Exhibit_II_4G but got no success. I did upgrades using CWM.
please suggest something how I can return at least 2G connectivity? Are there any debug method for Network connectivity issues? Gone thru all t679 related topics but did not find anything applicable for my case.
Much appreciate any help on this.
PS. currently installed: build version GINGERBREAD.UVLG3, kernel 2.6.35.7-custom [email protected]#7

Hmm have not had this problem before, you can try the flash to stock option, see if it will connect in that
Sent from my SGH-T679 using xda app-developers app

tazmaniondvl said:
Hmm have not had this problem before, you can try the flash to stock option, see if it will connect in that
Sent from my SGH-T679 using xda app-developers app
Click to expand...
Click to collapse
Just installed stock version UVLG3 (http://forum.xda-developers.com/wiki/Samsung_Galaxy_Exhibit_4G#Flash_Back_to_Stock) but result is the same. I also found if I change settings->Mobile networks->Network mode from default GSM/WCDMA to any other (GSM only for ex) - these changes are not applied - so next time when I open these settings - it again dislpalys GSM\CDMA mode. Is this a bug or 'feature' ?
Does anyone know any network related debug methods?
...

Related

[Q] Cyanogen v.s. AOSP rom? What am i doing wrong??

Hi guys, appreciate the help with this. I have rooted and have tried all sorts of roms on my Milestone
However with Cyanogen cm7 with Gingerbread 2.3 and other variances of the cm7 i cannot get any network coverage or cant connect to my provider. However my phone works perfect with the 2.3 AOSP roms...
Is there something obvious I am doing wrong? Am i missing something when installing cyanogen roms?
Help?
bikinibottom100 said:
Hi guys, appreciate the help with this. I have rooted and have tried all sorts of roms on my Milestone
However with Cyanogen cm7 with Gingerbread 2.3 and other variances of the cm7 i cannot get any network coverage or cant connect to my provider. However my phone works perfect with the 2.3 AOSP roms...
Is there something obvious I am doing wrong? Am i missing something when installing cyanogen roms?
Help?
Click to expand...
Click to collapse
Yes...You probably need to apply the basebands of your region when you install CM roms.
You can do that in Androidiani 3.3 Open Recovery, on the menu "Change baseband"
vladstercr said:
Yes...You probably need to apply the basebands of your region when you install CM roms.
You can do that in Androidiani 3.3 Open Recovery, on the menu "Change baseband"
Click to expand...
Click to collapse
Ahh OK so it has got to do with applying the basebands to my region.
I have seen this option in Open Recovery 3.3 . Is there any specific file I need to download or number I need to know before attempting to change my baseband.?
i live in New Zealand.
thanks.
bikinibottom100 said:
Ahh OK so it has got to do with applying the basebands to my region.
I have seen this option in Open Recovery 3.3 . Is there any specific file I need to download or number I need to know before attempting to change my baseband.?
i live in New Zealand.
thanks.
Click to expand...
Click to collapse
No, you dont need to download additional files. Just go to Androidiani 3.3 and try applying bands until you get coverage. Many of the people apply RTEU and it works. I dont know what is the baseband for your region, but you switch between them and you will find the proper one.
Hope I've been helpful!
vladstercr said:
No, you dont need to download additional files. Just go to Androidiani 3.3 and try applying bands until you get coverage. Many of the people apply RTEU and it works. I dont know what is the baseband for your region, but you switch between them and you will find the proper one.
Hope I've been helpful!
Click to expand...
Click to collapse
Sweeet as..You have been most helpful. Its working perfectly now. thanks
If you're with XT use the Brazil bb.
Sent from my Milestone using XDA Premium App
Where abouts in NZ are you? I'm also a Kiwi (Gisborne) and I have no baseband trouble at all on any of the GB ROM's, or any ROM's for that matter. I've never had to mess with the baseband and I move from ShadowMod to Cyan7 all the time as they release new updates.
What baseband did you use? Im having the same problem and I can't get 3g working for the life of me. I think it's a mixture of apn setting and baseband. Im on 2degrees btw.
I need help with this too. I live in Auckland and use Vodafone NZ. Originally, my milestone came installed with Froyo (v2.2) and it was the Europe version I believe......both 2G and 3G works fine on it, however I have problems with the wifi like many people have.
So then I later flashed to the New Zealand v2.1 SBF, and now wifi works fine but I can't get any connection to Vodafone. The reason is basically because Vodafone doesn't support Milestone, only Telecom XT does. However, if I switch the network from 2G to 3G, then I can connect to Vodafone. I can also connect to 2Degrees, I can see all 3 networks (Telecom, Vodafone, 2Degrees) when I'm on 3G and I get about 3/4 bars constant so it's stable.
But when if I switch to 2G, I get completely no bars and can't detect any networks at all. Not a big deal but I wanna use 2G to save battery. When I was using the Europe SBF (the v2.2 Froyo that came pre-installed with the Milestone), I was able to use 2G no problem.
Anyway, I think a simple baseband change should be fine, but I'm not sure which one I should use that works well with Vodafone NZ.
The baseband has to match your handset's capability. Xt units lack the Vodafone 900 band, they have 850 instead. Both carriers use 2100 in the CBD. Vodafone has also 2g network that has crap coverage. I'm using my xt set with Vodafone, but there's no point changing the bb as xt ms can't do 900 anyway. Basically get ****ty GPRS except right in town. It's only used as car GPS/stereo so no biggy for me.
but mine isn't originally an XT Milestone, I bought it 2nd hand on Trademe and the original owner of the phone got it from somewhere else. It's just that I flashed the New Zealand v2.1 SBF, which just so happens to be for Telecom since there isn't one for Vodafone......
Plus, it was able to work fine on 2G when I was using the Europe v2.2 (Froyo) SBF, so I don't see why a simple baseband change isn't possible?
Check the exact model number, most of the ones floating in nz are telecom models, no matter what the previous owner was using it with. You can change basebands as much as you want, if it doesn't match your hardware it just won't work. I.e. you will not have 3g outside of main centres. Afaik, 2g is the same on all models.
So, install OR, then one of the cyanogen based roms (it has all nz apns). Boot into or, there's a list of basebands - try till you get one that works.
Have you set your APN setting right?
Sent from my Milestone using XDA App
Cyanogen based roms have all the nz apns, otherwise, you have to put the correct one in.

UMTS not working

Just got my Droid 4 and try to use it with GSM in Germany. I'm on the .212 leak.
However, I have no HSPA/UMTS reception. Not even EDGE. Only GPRS works.
I tried out everything, set it to WCDMA preferred, tried all the build.prop tweaks, nothing helped.
Tried out a different SIM, and I'm sure my APN is set up correctly.
It is not related to my region, my Droid 3 works perfectly here.
I think I have a hardware reception issue, but still hope it is just a configuration.
Any suggestions are highly appreciated.
rweb said:
Just got my Droid 4 and try to use it with GSM in Germany. I'm on the .212 leak.
However, I have no HSPA/UMTS reception. Not even EDGE. Only GPRS works.
I tried out everything, set it to WCDMA preferred, tried all the build.prop tweaks, nothing helped.
Tried out a different SIM, and I'm sure my APN is set up correctly.
It is not related to my region, my Droid 3 works perfectly here.
I think I have a hardware reception issue, but still hope it is just a configuration.
Any suggestions are highly appreciated.
Click to expand...
Click to collapse
I'm not fully sure if the Droid4 has world bands in place. In the "Set GSM/UMTS band" I see only USA Band listed.
Also, do you have your APN setup correctly? Make sure the APN authentication is set properly, that's one of the bigger bugs out there with the new builds. Also, have you tried using a custom ROM?
The Droid 4 for sure has the proper bands for UMTS/HSDPA in Europe. Has to be an APN thing. Hopefully somebody else can shed some light on this, as I am planning to use my Droid 4 in Germany as well in the coming months. I know there is someone from Holland on this forum that has no problem using his Droid 4 there (he is also on one of the latest ICS leaks).
Does the foreign SIM card initiate some type of APN configuration when inserted?
As I said I'm really sure APN is correct, I doublecheckt it a couple of times. I'm also sure it is not an APN problem because data IS working, but only with GPRS. Could try a different ROM, but I doubt it will help, I had this issue both with stock Gingerbread and leaked ICS.
Were you able to get this figured out?
i have also problem to get data, it connects to network but there is no data. :// have tried everything with apn and network settting but no chance..
p.s.: i am on .212 leak
So did something maybe change from ICS build 211 to build 212? Did you guys have any problems on the previous leaks?
i dont know if it works actually with 211.. does anyone know if i downgrade to .211 leak from 212
fatihx said:
i dont know if it works actually with 211.. does anyone know if i downgrade to .211 leak from 212
Click to expand...
Click to collapse
Sure. Over at droidforums, there is a tutorial on how to do it. You have to fastboot GB 19 first, then use the unstick tool with the 211 Kernel, followed by flashing of the 211 ICS leak. I have been doing this every single time going from one leak to the next.
Sent from my DROID4 using Tapatalk 2
GermanGuy said:
Sure. Over at droidforums, there is a tutorial on how to do it. You have to fastboot GB 19 first, then use the unstick tool with the 211 Kernel, followed by flashing of the 211 ICS leak. I have been doing this every single time going from one leak to the next.
Sent from my DROID4 using Tapatalk 2
Click to expand...
Click to collapse
but i mean not upgrade, downgrade..
fatihx said:
but i mean not upgrade, downgrade..
Click to expand...
Click to collapse
Downgrading within the ICS leaks works the same way as upgrading as long as you have the proper leak and kernel.
Do any of you Canadian forum members have difficulty with Data on the latest ICS leaks?
i can confirm that data on .213 leak doesnt work also in germany. i will try .211 later...
could someone send me the build.prop(.211) for compare before i downgrade..
fatihx said:
i can confirm that data on .213 leak doesnt work also in germany. i will try .211 later...
could someone send me the build.prop(.211) for compare before i downgrade..
Click to expand...
Click to collapse
No issues up here in Canada on 213...
Sent from my XT894 running ICS

[Q] Droid 3 solana CM10.1 "No Service"

Hi,
I flashed my droid 3 with the current CM10.1 ROM and it's working... Except for the SIM card.
It's plain not recognizing the sim. No calls, no SMS, no data.
I couldn't find anywhere how to fix nor even how to debug it.
I'm pretty new to android flashing but have extensive experience as Linux sysadmin (15+ years), so any hint about how to debug it would be very welcomed.
Any hints?
( Ahh, I'm in Brazil, using GSM)
Thanks in advance,
Leon
Hi,
Try to find the library libmoto_ril.so from the stock rom at /system/lib, and replace it. You should get signal, but until now, I'm not aware of anyone that made 3g work on JB Roms with GSM networks.
Also replace the line:
ro.telephony.default_network=3
On the default build.prop it is 7 (for CDMA).
Hope this helps.
Sent from my XT860 using xda app-developers app
Hey, I am having the same problem on my droid 3 cm 10.1 installation. I live in Australia and my droid 3 is a Verizon one. I did what you said and then it doesnt boot but stays stuck on the loading screen. I even tried Hashcode's GSM patch and still remains stuck. Any Ideas.
Sent from my DROID3 using xda app-developers app
i hope this one help you http://forum.xda-developers.com/showthread.php?t=1989359
CDMA network is not working
Hi guys,
I recently purchased unlocked Motorola Droid 3 Verizon. But on this phone CDMA sim does not work, GSM working correctly. I need solution....

Issue with mobile data on nubia z9 mini

Hi,
i recently installed Chinese rom of Android 5.1.1 on my nubia z9 mini indian device.
Most of the things work fine so far only issue I have is one with mobile data.
I'm not able to get mobile data working.
Network gets selected fine but internet does not work.
I have read multiple threads and looks like this is known issue. Someone did mention that he found solution but I did not find link to his ROM.
I want to know how to fix this issue.
APN is correctly set.
Thanks,
Dilkush
I faced the same problem in Indian Version but after coming back to indian version, I placed only that sim card in which net plan is active. Then after that i place the second sim now both r working and with data connection. Try this. Let me know if it success.
Mine is working
way beyond testing this options!!!!
Sent from my Z9MINI using XDA Forums
Did u try
M_Aashish said:
Did u try
Click to expand...
Click to collapse
nope... i had flashed that gsm patch and after that data was working.
now im on cm 6.0 and since flashing that gsm patch data issur never came up...
Sent from my Z9MINI using XDA Forums

LTE Band Question

Hi everyone,
My carrier band is supported on the Mix namely B3 and B7. However, it is not possible to get 4G signal at all on the phone, only 3G.
Any suggestions?
Thanks
Vincent
Leechoonhwee said:
Hi everyone,
My carrier band is supported on the Mix namely B3 and B7. However, it is not possible to get 4G signal at all on the phone, only 3G.
Any suggestions?
Thanks
Vincent
Click to expand...
Click to collapse
Settings/SIM card/preferred network
Or maybe you need to setup APN manually.
jazz452 said:
Settings/SIM card/preferred network
Or maybe you need to setup APN manually.
Click to expand...
Click to collapse
Thanks for the suggestions but I have tried that to no avail. I install the LTE discovery app and there is no LTE signal at all.
I also tried flashing the modem file from China dev rom but it is also the same.
Leechoonhwee said:
Thanks for the suggestions but I have tried that to no avail. I install the LTE discovery app and there is no LTE signal at all.
I also tried flashing the modem file from China dev rom but it is also the same.
Click to expand...
Click to collapse
So your old phone worked ok? Can you try a different carrier SIM card to check.
What carrier are you on and what are your APN settings?
jazz452 said:
So your old phone worked ok? Can you try a different carrier SIM card to check.
Click to expand...
Click to collapse
Old phone is ok
omniphil said:
What carrier are you on and what are your APN settings?
Click to expand...
Click to collapse
I'm in Singapore and my carrier is Starhub. The apn settings are auto created and I double checked against other phone it is the same settings.
There is an issue with the latest update that causes the device not to connect to LTE. According to the official forum, it should be fixed in the next update, which is about a week away.
Edit: Some have suggested reflashing your ROM and doing a factory reset as well. Most of what I have seen points to the developer ROM. If you are using the developer ROM, then flashing back to the Chinese Stable and factory resetting the device should solve it. If you are using a vendor ROM, the same is recommended.
Just an update to anyone facing the same issue. This is a bug on the development rom and hence it affects all eu / custom rom that derive from there. Once flash onto the latest stable will resolve this issue.

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