Develop Bugs

N910V No signal in Argentina

Hello everyone,
I bought a Unlocked Note 4 from Verizon in USA. In Argentina I don't have signal. We use GSM so it should work right. I know this device has not root access. I just want to make some calls or messages.
It doesn't let me search network manually. It throws an error "error searching networks"
Android Version: 4.4.4
Network Mode: Global/GSM
Somebody could help me on this.
Thanks in advance.

fernandorado said:
Hello everyone,
I bought a Unlocked Note 4 from Verizon in USA. In Argentina I don't have signal. We use GSM so it should work right. I know this device has not root access. I just want to make some calls or messages.
It doesn't let me search network manually. It throws an error "error searching networks"
Android Version: 4.4.4
Network Mode: Global/GSM
Somebody could help me on this.
Thanks in advance.
Click to expand...
Click to collapse
I am in Europe past month, leaving to us in few days and was using my note4 in GSM mode all the time and switching between carriers on a prepaid sim. I would do factory reset or maybe get a new sim.
My prepaid sim allows roaming on all carriers.
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Sent from my SM-N910V using Tapatalk

I already flash the mobile with Odin thinking that the Android version might be the problem. It still not getting signal. I'll try with another SIM card.
Did you use others GSM carriers instead of T-Mobile?

fernandorado said:
I already flash the mobile with Odin thinking that the Android version might be the problem. It still not getting signal. I'll try with another SIM card.
Did you use others GSM carriers instead of T-Mobile?
Click to expand...
Click to collapse
Yes I roam on Plus Poland and Orange Poland with no issues.
Sent from my SM-N910V using Tapatalk

I tried with many SIMs, I flashed the device three times and I still having. So maybe there is a another issue. Please someone can help me. How is the Micro SIM should I use?

Which carrier are you using this on? Verizon has always used CDMA for 3G, not GSM. The Verizon Note 4 (SM-N910V) does seem to have limited GSM support, but it might not work on every GSM carrier.
This website seems to be pretty accurate: http://www.willmyphonework.net/

Acording to that page my phone should work perfectly
with 2G, 3G, 4G LTE.
I'm using:
Brand: Samsung
Model: SM-N910V
Country:Argentina
Carrier:Claro Argentina
I don't know what is the problem.:crying:

You may need to add new APN settings before it will work.
On mine, the option to add a new APN is disabled, but I'm actually using mine on Verizon with a Verizon SIM card, so I'd have no reason to edit the APN settings manually. Are you able to edit yours?

I already set the APN and nothing happens. I'm not sure APN could be the problem. Should be something else.

fernandorado said:
I'm not sure APN could be the problem.
Click to expand...
Click to collapse
If the APN settings aren't correct, it could absolutely be the problem. It's worth double checking.

APNs
I tried with severals APN and nothing happens.
-
-
I have an Oneplus One with the same APN and works perfectly. That's why I think the APNs are not causing the problems of signal. I still having no signal. I cant make neither a call nor send a message.

fernandorado said:
I tried with severals APN and nothing happens.
-
-
I have an Oneplus One with the same APN and works perfectly. That's why I think the APNs are not causing the problems of signal. I still having no signal. I cant make neither a call nor send a message.
Click to expand...
Click to collapse
what if you put it in GSM mode and then search for carrier and then try to register on it? that is how I Switch networks to roam on.

Select carriers
patt2k said:
what if you put it in GSM mode and then search for carrier and then try to register on it? that is how I Switch networks to roam on.
Click to expand...
Click to collapse
I did thit but the movile doesn't let me select networks to register on. I always get the error message "error while searching networks".

fernandorado said:
I did thit but the movile doesn't let me select networks to register on. I always get the error message "error while searching networks".
Click to expand...
Click to collapse
Hmm sorry bro not sure what is going on.. last thing I could suggest if you have some money to spare try any other sim card from different provider or ask a friend to swap it for a minute or two,anything to test that it's not your carrier somehow not wanting to work with VZW N4.

patt2k said:
Hmm sorry bro not sure what is going on.. last thing I could suggest if you have some money to spare try any other sim card from different provider or ask a friend to swap it for a minute or two,anything to test that it's not your carrier somehow not wanting to work with VZW N4.
Click to expand...
Click to collapse
I think this phone has the bands blocked. I do not know how to check this.

fernandorado said:
I think this phone has the bands blocked. I do not know how to check this.
Click to expand...
Click to collapse
Hey I read something couple days ago and forgot to get back at you.. I read somewhere if you block activation agent it should work some people on T-Mobile USA had the same issue. Use debloater to block activation agent on boot. They said this could be because the note could never been activated on Verizon even for 30 seconds and this is why it might be happening.
So block activation agent,and setup wizard so it's blocked on EACH BOOT.
Let me know

blindmanpb said:
If the APN settings aren't correct, it could absolutely be the problem. It's worth double checking.
Click to expand...
Click to collapse
I tried this but it did't work. I blocked everything from Verizon and I still without signal. :crying:

fernandorado said:
I tried this but it did't work. I blocked everything from Verizon and I still without signal. :crying:
Click to expand...
Click to collapse
Hmm I am running out of ideas bro. Is there any other provider you can try ?
Sent from my SM-N910V using Tapatalk

fernandorado said:
I tried this but it did't work. I blocked everything from Verizon and I still without signal. :crying:
Click to expand...
Click to collapse
Have u tried inserting dummy verizon sim?

I do not have any dummy sim from Verison.

Dual Sim Issue

Hi All,
I'm having an issue with dual sim as follows, if I switch the data connection from SIM1 to SIM2 it switches it over to SIM2 and works but SIM1 then stops working completely, e.g. no calls, text messages, no signal registered and in the status it says SIM1 is "disconnected". If I then switch back the data connection to SIM1 it works again and so does SIM2.
Is this a known issue with the version of Android 5.1.1 that Wileyfox are using?
FYI, I've raised it with Wileyfox support and they say the issue doesn't exist, even though I sent them a screencast showing it doing it!!
Thanks.
Andrew.

da644 said:
Hi All,
I'm having an issue with dual sim as follows, if I switch the data connection from SIM1 to SIM2 it switches it over to SIM2 and works but SIM1 then stops working completely, e.g. no calls, text messages, no signal registered and in the status it says SIM1 is "disconnected". If I then switch back the data connection to SIM1 it works again and so does SIM2.
Is this a known issue with the version of Android 5.1.1 that Wileyfox are using?
FYI, I've raised it with Wileyfox support and they say the issue doesn't exist, even though I sent them a screencast showing it doing it!!
Thanks.
Andrew.
Click to expand...
Click to collapse
By chance, are you on a 3G and up contract, from the likes of three?
I know that when you switch data priorities it defaults the non data sim to 2G. So if you are on 3 that will essentially disable the sim like you are seeing as three only provide 2G signal when there is no 3G or 4G signal in that area. They lease the 2G signal from another network, used to be EE but not sure anymore.
Just a thought, have a look at Settings > Sim Cards and select the Sim that is not being used for data, if that is showing Preferred Network Type of 2G, try changing it.

teamcoy said:
By chance, are you on a 3G and up contract, from the likes of three?
I know that when you switch data priorities it defaults the non data sim to 2G. So if you are on 3 that will essentially disable the sim like you are seeing as three only provide 2G signal when there is no 3G or 4G signal in that area. They lease the 2G signal from another network, used to be EE but not sure anymore.
Just a thought, have a look at Settings > Sim Cards and select the Sim that is not being used for data, if that is showing Preferred Network Type of 2G, try changing it.
Click to expand...
Click to collapse
Yes, I'm on 4G on both SIMs, one is on 3 and the other is on EE. I've tried all different combinations of the settings, switching the SIM cards around, etc... however no matter what I try, switching data from SIM1 to SIM2 always disables SIM1 fully. It must be a Android bug / feature.

da644 said:
Yes, I'm on 4G on both SIMs, one is on 3 and the other is on EE. I've tried all different combinations of the settings, switching the SIM cards around, etc... however no matter what I try, switching data from SIM1 to SIM2 always disables SIM1 fully. It must be a Android bug / feature.
Click to expand...
Click to collapse
Ok, I can replicate the issue with 3 in Sim 1 and GiffGaff in Sim2, changing data to Sim 2 sends Sim 1 to 2G only which three doesn't support where I am based and so it effectively kills the sim. Toggling the 3 sim to 3G or 4G sorts it for me.
Tried with Vodafone in Sim 1 and GiffGaff in Sim 2 and toggling between them works seamlessly as both networks have 2G fallback.

teamcoy said:
Ok, I can replicate the issue with 3 in Sim 1 and GiffGaff in Sim2, changing data to Sim 2 sends Sim 1 to 2G only which three doesn't support where I am based and so it effectively kills the sim. Toggling the 3 sim to 3G or 4G sorts it for me.
Tried with Vodafone in Sim 1 and GiffGaff in Sim 2 and toggling between them works seamlessly as both networks have 2G fallback.
Click to expand...
Click to collapse
Hmm... ok, I will try again and see what I can do but I'm sure I tried switching the SIM cards around before. Thanks.

da644 said:
Hmm... ok, I will try again and see what I can do but I'm sure I tried switching the SIM cards around before. Thanks.
Click to expand...
Click to collapse
Hi, I didn't switch the sims to get it to work just the preferred network type for the three sim.

This is the setting that I mean.
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It defaults to 2G for the non data sim, but changing it to 3G or 4G brings the three one back to life when it is the secondary sim.

teamcoy said:
This is the setting that I mean.
View attachment 3675066
It defaults to 2G for the non data sim, but changing it to 3G or 4G brings the three one back to life when it is the secondary sim.
Click to expand...
Click to collapse
I've tried this and it doesn't work for me, with EE in SIM1 and 3 in SIM2 both work fine when SIM2 (3) is the data connection but as soon as I switch to SIM1 (EE) for the data connection it disables SIM2 (3) completely and the setting you have mentioned is already set to 4G for both SIM's.

da644 said:
I've tried this and it doesn't work for me, with EE in SIM1 and 3 in SIM2 both work fine when SIM2 (3) is the data connection but as soon as I switch to SIM1 (EE) for the data connection it disables SIM2 (3) completely and the setting you have mentioned is already set to 4G for both SIM's.
Click to expand...
Click to collapse
That is bizarre.
For me, switching the data sim also switches the preferred type to 2G for the non data sim.
Try something, change the preferences so that EE is doing the data, then reboot and clear caches from recovery (vol down and power from powered off), then reboot system.
You shouldn't need to do that but I am curious if it may clear out the gremlins.

teamcoy said:
That is bizarre.
For me, switching the data sim also switches the preferred type to 2G for the non data sim.
Try something, change the preferences so that EE is doing the data, then reboot and clear caches from recovery (vol down and power from powered off), then reboot system.
You shouldn't need to do that but I am curious if it may clear out the gremlins.
Click to expand...
Click to collapse
Thanks for the suggestion, tried that, didn't work either.

Yes, I had the same issue, I think its because 3 doesn't support 2G, as soon as I make it T-Mobile is my data provider, the Three sim goes dead. Think I may just port my Three number to another network provider

4G_now said:
Yes, I had the same issue, I think its because 3 doesn't support 2G, as soon as I make it T-Mobile is my data provider, the Three sim goes dead. Think I may just port my Three number to another network provider
Click to expand...
Click to collapse
Is there any workaround for this issue that anyone is aware of? I have an iD Mobile SIM which I understand runs on the Three network, and am getting just the symptoms described by others. In short is this a bug in the software for the phone or a network problem?

da644 said:
I've tried this and it doesn't work for me, with EE in SIM1 and 3 in SIM2 both work fine when SIM2 (3) is the data connection but as soon as I switch to SIM1 (EE) for the data connection it disables SIM2 (3) completely and the setting you have mentioned is already set to 4G for both SIM's.
Click to expand...
Click to collapse
Seeing the exact same issue, with EE sim in 1 and Three sim in 2.
Wileyfox android version 6.0.1 Cyanogen version 13.0-ZNH0EAS2NH
With EE sims in both slots and my data connection being sim 1: the data connection seems to randomly connect to sim 2 after a reboot without me changing it
Brand new phone. Will be returning it.

Apologies for being a 'me too', but I've just had this exact same problem. BT/EE in sim2, Three in sim2. BT/EE is the main data provider, but when enabled, sim2 is completely dead.
Is this a Wileyfox issue, or a Cyanogen Mod issue?
I like the phone, and don't want to replace it unless I have to, but I need two working sims. So it's whether to go with another Wileyfox, or avoid Wileyfox or CM.

Network problem on ONE PLUS 3

I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?

[email protected] said:
I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?
Click to expand...
Click to collapse
thats probably because jio is a 4g only network and oneplus 3 doesn't support both sims running 4g at the same time.

bonham1988 said:
thats probably because jio is a 4g only network and oneplus 3 doesn't support both sims running 4g at the same time.
Click to expand...
Click to collapse
But bsnl is not 4g right?

[email protected] said:
But bsnl is not 4g right?
Click to expand...
Click to collapse
That doesn't matter, you can only set 4g network on the sim that has an active data connection. Suppose you have idea and Airtel and both have 4g, which ever sim is your data sim will be able to have 4g access.
Sent from my OnePlus3 using XDA Labs

[email protected] said:
I just brought a One plus 3 last week.
I m using jio in sim slot 1 and bsnl in sim slot 2.
If I select cellular data on the Jio sim, both sims have network. But if I select cellular data on Bsnl sim, jio does not get network. I m using on oxygen OS 3.2.6.
It is hardware or software problem?
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down
---------- Post added at 07:42 AM ---------- Previous post was at 07:41 AM ----------
nikhil.agrawal said:
That doesn't matter, you can only set 4g network on the sim that has an active data connection. Suppose you have idea and Airtel and both have 4g, which ever sim is your data sim will be able to have 4g access.
Click to expand...
Click to collapse
I Have Oneplus 3T Us A3000 Model. I am From India
actually here is the main issue is Volte Related, meanwhile 4g is working internet working super but Volte for calling not working. even i switch on Volte in settings but still they did not work for i try everything.
then i search and got the band issue is here i checked my Network provider using Band 3,5,40.
but in my mobile has band 5. so i unlock rest network bands by Qcn File of CN.
successfully unlocked the all my network provider bands.
but still Volte is not working i try my all efforts and things factory reset, custom rom but still Volte not working for me.
2nd issue
even now only 1 sim can work at a time other network gone out and when i try to search network the error comes (error while searching network)
means dual stand by is not working for me. vice versa same when i switch internet on 2nd sim 1st network gone
even i switch 1 sim on 4G and other on 2G.
?please help me out my Oneplus 3T is down

Data and voice on different SIM, a simple question.

I have 2 sim on my OP3.
Sim 1 default for voice and messages
Sim 2 default for data. (tried with different sim).
When i place a call using sim 1, data on sim 2 drops.
When i hang up, data on sim 2 is back again.
Is that normal? LTE, WCDMA, no matter which protocol i use, but it's always the same scenario...
Thanks

Fentadroid said:
I have 2 sim on my OP3.
Sim 1 default for voice and messages
Sim 2 default for data. (tried with different sim).
When i place a call using sim 1, data on sim 2 drops.
When i hang up, data on sim 2 is back again.
Is that normal? LTE, WCDMA, no matter which protocol i use, but it's always the same scenario...
Thanks
Click to expand...
Click to collapse
Depends on network too.
On one network when I recieve a call, internet drops.
But when I place a call, internet works.
While on other sim when I place a call, network switches to 3g and back to 4g when I drop the call.
But while calling you would need one sim in 2g and other in 3g or 4g for the internet to work.

Navi44 said:
Depends on network too.
On one network when I recieve a call, internet drops.
But when I place a call, internet works.
While on other sim when I place a call, network switches to 3g and back to 4g when I drop the call.
But while calling you would need one sim in 2g and other in 3g or 4g for the internet to work.
Click to expand...
Click to collapse
Well... i will try to explain better the situation...
In other words, if i place a call with the sim that is NOT used for data, the other sim, drop the connection.
Whatever slot i use, or network type or carrier.

I can't remember the exact terminology but there are two types of dual sim phones - in effect "2 phones in one case" and "one phone with access to 2 sims". The terms may be dual active and dual standby and there are acronyms something like DSDA for dual sim and dual active. I would think the op3 has standby sims and whichever makes or receives a voice call has priority and takes over the only "transmitter"
See this link https://forum.xda-developers.com/oneplus-2/help/dsda-dsfa-t3220593

Try turning off VoLTE in sim settings. This may help.

Carriers i use, don't support VoLTE, so... i haven't any option to disable.
So.... nobody with 2 sim here ?
I really don't know if that is a bug or is normal....
That is what i mean.
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Standby
During a call on SIM 1.
(SIM 2 is for data, you can see "4g" is gone..)

Only one SIM can be active at any given time. When there is no call, the SIM are in standby and data can be used on either of the SIM. But the moment a call is active, that SIM becomes the active SIM and if that's the one being used for data, then it is available and the other is not.

Fentadroid said:
Carriers i use, don't support VoLTE, so... i haven't any option to disable.
So.... nobody with 2 sim here ?
I really don't know if that is a bug or is normal....
That is what i mean.
View attachment 4101894
Standby
View attachment 4101895
During a call on SIM 1.
(SIM 2 is for data, you can see "4g" is gone..)
Click to expand...
Click to collapse
Does this make the position clear ? http://gadgetguideonline.com/android/android-101/dual-sim-android-phones-dual-standby-vs-dual-active/ It references points made in this thread and has a list of dual active sim phones. I can only find specifications for the op3 and op3T that state they are "standby" sims.

Hello I am say from my experience that when I use jio sim in India which has volte calls works as well as internet side by side. But when I use airtel sim for internet and Vodafone sim for calls and SMS the same problem happens. There is something technologically called they have 4g or may be 3g for internet at the same time they are using 2g technology for calls it may be outgoing or incoming. So when I try to pit some calls 4g symbol will disappear after disconnecting it will appear again. So please check with operator what kind of technology they are providing truly 4g or combination of 4g technology.
Then you can understand it properly I think.

peterk-1 said:
Does this make the position clear ? http://gadgetguideonline.com/androi...m-android-phones-dual-standby-vs-dual-active/ It references points made in this thread and has a list of dual active sim phones. I can only find specifications for the op3 and op3T that state they are "standby" sims.
Click to expand...
Click to collapse
crystal clear

ok try this, put the data sim in slot 1 and call sim in slot 2, tell me if that works

No way. If enable data on SIM 1 end use the SIM 2 to call, data on SIM 1 drops.
If i use data on SIM 1 and use the same SIM to call, data will stay active. Same thing if i revert SIM on slot.
I think... this is the phone...

Why my preferred data sim only gets network?

I have a Lenovo Vibe P1 Turbo device which is dual sim smartphone and i am using 2 sim
1. Jio 4g
2. Airtel
For the NOTE my device doesn't supports VoLte
Now when i set my Sim 1 Jio 4g as preferred data sim my 2nd sim i.e Airtel loses network. i dont know why? :crying: It supports 2G & 3G though
even if i search for networks to get registered to get airtel network it says "Error while Searching networks"
To get network i always have set my 2nd sim as preferred data sim then only i get network but my 1st sim Jio 4g loses network that i understand why because Jio
suports only Lte network its true 4G thats why and my phone doesn't supports 4G on both sim slots.
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Then i thought its Jio sim that is giving me problem to other sim network then i inserted a vodafone sim which supports 2G ,3G ,4G all type of networks but no the
the problem still exists the only sim i get network is the preferred data sim. If i change Airtel as my preferred data sim Vodafone loses network and when i switch
Vodafone as preferred data sim Airtel loses network. Whats Going ON??? PLEASE HELP ME!
This Problem started just two weeks ago before that everything was Fine with networks.
The time this problem started i was using Resurection Remix ROM 7.1.1. Rooted
After that i Changed my ROM to UNOFFICIAL AICP 7.1.2 ROM thinking that ROM has RIL Bugs. But still i was not getting network then i Flashed Stock ROM to my
Lenovo Vibe P1 Turbo device. And now i am stuck with this ****ty problem of Netwoks. :crying::crying::crying::crying::crying::crying:
HELP! PLEASE! THANK YOU
Currently on stock rom.
If anyone replying to the post please QUOTE me.

Did you tried to wait for 5 - 10 mins after changing settings?

Downgrade your Airtel Sim to 3G only
mity_dev said:
I have a Lenovo Vibe P1 Turbo device which is dual sim smartphone and i am using 2 sim
1. Jio 4g
2. Airtel
For the NOTE my device doesn't supports VoLte
Now when i set my Sim 1 Jio 4g as preferred data sim my 2nd sim i.e Airtel loses network. i dont know why? :crying: It supports 2G & 3G though
even if i search for networks to get registered to get airtel network it says "Error while Searching networks"
To get network i always have set my 2nd sim as preferred data sim then only i get network but my 1st sim Jio 4g loses network that i understand why because Jio
suports only Lte network its true 4G thats why and my phone doesn't supports 4G on both sim slots.
View attachment 4186325
View attachment 4186330
Then i thought its Jio sim that is giving me problem to other sim network then i inserted a vodafone sim which supports 2G ,3G ,4G all type of networks but no the
the problem still exists the only sim i get network is the preferred data sim. If i change Airtel as my preferred data sim Vodafone loses network and when i switch
Vodafone as preferred data sim Airtel loses network. Whats Going ON??? PLEASE HELP ME!
This Problem started just two weeks ago before that everything was Fine with networks.
The time this problem started i was using Resurection Remix ROM 7.1.1. Rooted
After that i Changed my ROM to UNOFFICIAL AICP 7.1.2 ROM thinking that ROM has RIL Bugs. But still i was not getting network then i Flashed Stock ROM to my
Lenovo Vibe P1 Turbo device. And now i am stuck with this ****ty problem of Netwoks. :crying::crying::crying::crying::crying::crying:
HELP! PLEASE! THANK YOU
Currently on stock rom.
If anyone replying to the post please QUOTE me.
Click to expand...
Click to collapse
Downgrade your Airtel sim to 3G (Non 4G) and set your prefered data as Jio.

Sammmmmmmmmmm said:
Downgrade your Airtel sim to 3G (Non 4G) and set your prefered data as Jio.
Click to expand...
Click to collapse
Thank You for your help but i got it fixed from service centre. It was a hardware problem they changed my motherboard.

mity_dev said:
Thank You for your help but i got it fixed from service centre. It was a hardware problem they changed my motherboard.
Click to expand...
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Did they charge you for it or was it covered in your warranty.

Sammmmmmmmmmm said:
Did they charge you for it or was it covered in your warranty.
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my phone was in warranty so they didn't charged any amount.