Nexus S roaming problem with ICS - Nexus S Q&A, Help & Troubleshooting

Hi,
I have a Nexus S I9023 with baseband I9023XXKI1
Provider is Telenet in Belgium, which is a full MVNO with its own MNC
When running any Gingerbread version, the phone works fine when going out of the country, and returning.
But with any ICS rom (stock or CyanogenMod) the phone will not be able to connect to any international providers, when my providers SIM is installed. But when I stick my providers SIM into another phone the SIM will switch over, after which I can put it back into my Nexus S and I can roam to any other international provider without problems, but the phone will not switch back to my own provider when I get back into the country. At this point I again have to put the Telenet SIM into another phone to force it out of roaming mode after which I can put it back into my Nexus S and it works again on my own provider.
I also tried with another Telenet SIM and had the exact same problem, so it is not a problem with the specific SIM itself. But when I stick in a non-Telenet SIM it does switch to roaming and non-roaming without problems. So it clearly is a combination of the ICS ROM with the Telenet SIM.
The only other thing I found is that the MNC code in apns-conf.xml is wrong for Telenet. It is listed as MNC=10 which used to be correct until sometime last year when everyone was issued a new SIM with MNC=05. But with a custom APN setup mobile data works fine.
If anyone has any idea how I could solve this issue, I would love to hear about it!

Cant Activate/Deactivate International Call Roaming on Nexus S.
Hi,
Same issue here, mine is Nexus S, running ICS 4.0.4, baseband version I9020XXKI1. I am not able to make calls in roaming. I spoke to my provider (O2 Germany) and they say that, I have to deactivate the lock (Lock to activate roaming). I haven't found any way to unlock this service. I have not tried what the OP has mentioned in his post (i.e., to put the sim into another phone and then try back in Nexus S). But I would like to know, how can I Activate or Deactivate the roaming lock ??
Thanks,
Cheers!!

esunny said:
Hi,
Same issue here, mine is Nexus S, running ICS 4.0.4, baseband version I9020XXKI1. I am not able to make calls in roaming. I spoke to my provider (O2 Germany) and they say that, I have to deactivate the lock (Lock to activate roaming). I haven't found any way to unlock this service. I have not tried what the OP has mentioned in his post (i.e., to put the sim into another phone and then try back in Nexus S). But I would like to know, how can I Activate or Deactivate the roaming lock ??
Thanks,
Cheers!!
Click to expand...
Click to collapse
The only roaming feature you can enable is for Data. This has no effect on roaming for normal phone usage.
You can change this setting under "System Settings" -> "More..." (under Wireless & Networks) -> "Mobile Networks"
Here you will find a "Data roaming" option, and possibly a "National data roaming" option

I have a Desire Z with Android 4.0.4 and Telenet for the cellphone also. I noticed I have to activate the romaing in Belgium to have the data connection which is strange as I'm in Belgium. Now I hear that they can be issues calling/sending sms abroad... I'll see when I'll be in Croatia.
I activated for the moment all the option (data roaming, national roaming) for the moment, nothing more strange than having the romaing activated and the 'R' in the network signal.

National Roaming seems to be needed on some phones, since the Telenet SIM swap last year to get a data connection in Belgium. On my own Nexus S phone I don't have the problem. But on my wife's SE Xperia Mini Pro (2011 model) with stock Android 2.3.4 it does have this issue.
The old sim used MNC=10, while the new SIM uses MNC=05 and it seems that some phones have some kind of issue with that.
MNC is the Mobile Network Code, which together with the MCC (Mobile Country Code) forms a identifier per provider.
http://en.wikipedia.org/wiki/Mobile_Network_Code

I narrowed down the issue somewhat.
Basically my prior workaround that the SIM needed to be swapped to another phone to force the network to connect was false.
What actually needs to happen to force the phone to enter or exit roaming is to pull the battery.
Rebooting the phone, or shutting it down and rebooting (cold boot) does not make a difference, the battery needs to be pulled and then the phone will switch networks.
I found this by accident, because I was out of the country and it was as normal refusing to switch to roaming mode. Then the battery died and I connected power to the phone and booted it, and it suddenly connected to a foreign provider in roaming mode.
Getting back to Belgium, it again refused to switch back, so I verified it by just pulling out the battery and putting it back and the phone successfully was able to connect to Telenet again.
In other words, some component needs to be reset for it to successfully switch to roaming and back. This component does not get turned off when the phone is turned off, so the battery needs to be pulled.

Related

GSM Settings While in Ireland

I have a Verizon TP2 and have unlocked the SIM. I'm heading for Ireland next week and have purchased a prepaid GSM SIM for use in Ireland. Do I need to reset any of the Phone Settings on my TP2 or will it automatically make the changes when I insert the SIM and turn it on in Ireland. Thanks.
cgtayloriii said:
I have a Verizon TP2 and have unlocked the SIM. I'm heading for Ireland next week and have purchased a prepaid GSM SIM for use in Ireland. Do I need to reset any of the Phone Settings on my TP2 or will it automatically make the changes when I insert the SIM and turn it on in Ireland. Thanks.
Click to expand...
Click to collapse
i am using sprint TP2, easy switch to GSM network, just go to setting/connection management/phone setting/network
choose GSM ONLY, then system will search GSM network automatically
remember insert GSM SIM card in the phone first
You will have to get data connection setting for the prepaid provider if you want to use your data connection
Rhodium500 said:
You will have to get data connection setting for the prepaid provider if you want to use your data connection
Click to expand...
Click to collapse
That is what happend to me with my VZW TP2 in Greece.
Switching to GSM only worked for the phone but I need settings for SMS and Data.
Got the settings but VZW put some kind of lock on the connections settings app. My settings would always revert back to the vzw settings and I would always get connection failur pop up.
Got back home and found online some details about "CMGaurdian"
This program either locks the conection manager or imediately reverts changes back to stock. I think you may need to disable this in registry to enable data and out going sms reliably.

[Q] Network problems with I9000 bought in Singapore, using in Canada

Hi everyone,
I bought a Samsung Galaxy S GT-I9000 (16gb) in Singapore and was using it fine on Singtel's network (signed a contract with them). Now I have moved back to Canada and brought my phone with me assuming that all would be ok to use it with the network here. However I'm having big problems with this one network I just signed up with (Virgin Mobile).
85% of the time I cannot connect to it: voice calls and SMSing won't work nor will the data work on it, the only thing it says is "Emergency calls only". Then at other times everything will seem to connect and work fine - I can make calls and use data.
Virgin Mobile will not support me much because they're thinking it's the phone's problem, if I use the phone they gave me (a lower-end model) it works fine.
Here are some details of my phone:
Firmware version
2 2
Baseband version
I9000DXJPA
Kernel version
2 6 32 9
root (at) SE-S604 #1
Build number
FROYO DXJPA
If I check out the status, it usually says this:
Network
Unknown (switches to VIRGIN when it does work)
Mobile network type
UMTS (switches between that and HSDPA and GPRS)
Service state
Out of service
Mobile network state
Disconnected (switches to connected when working, and even when it's not working sometimes)
I have Network mode set to auto mode (GSM/WCDMA). I've tried to switch it to GSM only but that didn't seem to change anything.
I'm wondering if there's some kind of configuration settings I still need to do with the phone? I'm also wondering if it is the network I'm with right now? Virgin Mobile isn't one of the bigger telcom companies here and I'm thinking that if I switch to one of the bigger telcoms, will it work better?
Something else to add - before I signed up with Virgin I was using my phone with a pre-paid service (called Chatr) for voice only and it was working fine.
I'm sure this phone can support the GSM frequencies here.. can't it?
I also still have the Singtel customizations on the phone. Will it help if I remove it?
Any help would be greatly appreciated!
Thanks a lot!
Ryan
sorry, wrong category..

[Q] Dual SIM phone roaming / not roaming question

Hi
I have a Zopo ZP950+ with Etotalk ROM, from China, it is a 5.7inch Phablet running stock JB, with Quad Core and DUAL SIM.
http://www.etotalk.com/zopo-zp950-16g_p3854.html
I am in UK, with UK SIM installed (T-Mobile), so at moment not roaming, but phone constantly tells me I am roaming.
I want to use the full 3G/HDSPA connectivity so do not want to disable data.. Under Settings/More/Mobile Networks, there are no options for roaming settings to change, though there is a "data connection - off" option, but I don't want to turn data off, and the roaming warnings are intrusive when sending texts or making calls.
If I can''t "fix" the fact that Roaming indicator is constantly on, even though phone is not roaming, can I hide the warnings every time I make a call or send a text?
Any 3rd party apps out there to help?
Thanks
While I wait for an answer, I will add this: I just tried a giffgaff SIM using O2 network, all is fine, seems to be a problem only with T-Mobile SIM, called T-Mobile they said I needed a replacement SIM card, but this SIM is fine in 2 other un locked (though not Dual SIM) handsets.
guygamps said:
Hi
I have a Zopo ZP950+ with Etotalk ROM, from China, it is a 5.7inch Phablet running stock JB, with Quad Core and DUAL SIM.
http://www.etotalk.com/zopo-zp950-16g_p3854.html
I am in UK, with UK SIM installed (T-Mobile), so at moment not roaming, but phone constantly tells me I am roaming.
I want to use the full 3G/HDSPA connectivity so do not want to disable data.. Under Settings/More/Mobile Networks, there are no options for roaming settings to change, though there is a "data connection - off" option, but I don't want to turn data off, and the roaming warnings are intrusive when sending texts or making calls.
If I can''t "fix" the fact that Roaming indicator is constantly on, even though phone is not roaming, can I hide the warnings every time I make a call or send a text?
Any 3rd party apps out there to help?
Thanks
Click to expand...
Click to collapse
more, any help would be appreciated
guygamps said:
While I wait for an answer, I will add this: I just tried a giffgaff SIM using O2 network, all is fine, seems to be a problem only with T-Mobile SIM, called T-Mobile they said I needed a replacement SIM card, but this SIM is fine in 2 other un locked (though not Dual SIM) handsets.
Click to expand...
Click to collapse
Replaced SIM card doing same thing, constantly warning of roaming, only difference is signal strength bars are blue, whereas before they were orange.
guygamps said:
Replaced SIM card doing same thing, constantly warning of roaming, only difference is signal strength bars are blue, whereas before they were orange.
Click to expand...
Click to collapse
Hi there I have the same issue with my Star Note II N9599 and it too reverts to Roaming and I use Orange UKeven though its now part of EE Network UK but I did find out that the handset is actually Roaming! To check this go into Dial Pad and type *hash*hash3646633hash*hash* then goto Connectivity then down CDS Information the to Radio Information then to Phone 1 and you can see if the Sim in slot 1 is truely Roaming or Not?
I have yet to find a fix for this issue but did also stumble across my Associated Network Radio Bands as follows:
GSM MODE ( SIM TRAY 1 & 2 )
EGSM900 (selected)
DCS1800 (selected)
PCS1900 (selected)
GSM850 (selected)
UMTS MODE ( SIM TRAY 1 ONLY )
WCDMA-IMT-2000 (selected)
WCDMA-PCS-1900 (greyed out)
WCDMA-DCS-1800 (greyed out)
WCDMA-AWS-1700 (greyed out)
WCDMA-CLR-850 (selected)
WCDMA-800 (selected)
WCDMA-IMT-E-2600 (greyed out)
WCDMA-GSM-900 (greyed out)
WCDMA-1800 (greyed out)
WCDMA-1700 (greyed out)
Now at best guess I take it these settings are not correct for the U.K.
If this is so then which BANDS Do I Need and how do I go about changing the greyed out ones that I cannot select to be selected as a usable Radio Band?
I have looked as best I can on Google etc but Im all new to this and not entirely sure what to look for or how to do it if possible?
I have read other sites of users being able to change the Radio Bands for other types of Handsets so I know there must be a way?
I still have the issue where I can set my phone to Register on the Orange network and it connects and gives me 3G with Data but soon after the connection decides to reset to Roaming and drops Data unless I choose to select Data Roaming?

[Q] LG Nexus 5 fails to recognize celullar network

Hello,
I have a Nexus 5 phone that came with Kitkat a few months back. The phone worked without issues until I decided to update to Lollipop 5.0 (OTA update) at the end of November. Initially the phone started to have troubles to detect the network at certain times - typically "playing" with the settings "Preferred network type" by changing from 4G to 2G, restarting, letting the phone detect the network on 2G mode and change back to 3G or 4G would fix the problem. The issue became more and more frequent until a point where i can not change the "Preferred network type" from 4G to any other type (as if it is "glued" on that setting). At this point my phone does not recognize at all the cellular network but It does seem to recognize the SIM card since i need to enter the 4 digit code to unlock SIM and it displays the network name, just no service.
I've researched the internet and I've tried several things but nothing seems to fix it such as restart mobile, change to airplane mode and back, take out and re-insert SIM card, request new SIM card from operator. The APN settings seem to be OK.
I've noticed that a new 5.1 version just came out and although I was not fully familiar with the process i decided to give it a try (after reading several instructions) and update manually (using factory images posted) and see if that would fix it. The phone is now with version 5.1 and still can't recognize the cellular network - no service. Everything else works fine, including Wi-Fi.
Has anyone experienced such issue after OTA update? The only odd thing I can think of is that I did the initial OTA update to 5.0 in US while i was on travel from Europe, but I can't say if this would in some way contribute to the issue. The mobile is D821 model.
Since I was stuck and mobile is within warranty period, I have sent it to service repair. I would be interested to know ideas of what could be the issue cause.
Sorry for long message, any help would be very much appreciated.
Pedro

Note3 seems to be locked to another service provider

My Mothers Note3 was purchased from her service provider in SA ( Telkom ) it is an unbranded prone and was not locked to her provider network.
She took the phone over to the US and used an AT&T sim there without a problem for a two weeks.
Upon her return she put her own sim back into the phone and it would not log onto her provider network.
Thinking it was the sim card I swapped it with mine from another service provider and it worked no problem.
placing her Sim into my phone also worked without a problem.
She had her sim card changed anyway and since then that phone will not connect to any other network than Vodacom. The phone was not bought from them and there is no reason why it would be locked to their network, but everything seems to be pointing to that.
Her service provider said they would have to replace the motherboard to fix it.
Can anyone enlighten me as to what could be causing this and if there is a fix for it?
Try changing the APN settings (Settings->More Networks->Mobile Networks->Access Point Names) and change the settings to the proper APN settings for Telcom (not sure what they are since I'm from the US, but just google it and they should be easy to find) and also check to make sure that your phone is searching for the right type of network (Settings->More Networks->Mobile Networks->Network Mode and select LTE/WCDMA/GSM) and see if it connects then.

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