Develop Bugs

Does the I9192 supports 3g sims on both slots?

I want to buy the I9192 and i wanted to know if it supports 2 sims that work only on 3g networks?
Or the second sim slot is only 2g?
Thanks!

Both the sim slots can be used for 3g reception.. but only one sim can be 3g at one tym.. i.e either sim 1 or sim 2 can be 3g at any given time...

by 3g you mean that i can use data only from 1 sim?
I have 2 sims from a networks that uses HSDPA 850 / 2100 - would both of the sims will work at the same time? (I don't need data on both of them, only on 1 sim, but i need reception for calls & sms on both sims)
Will it work?
Thanks!

Yes. Only one sim will be used for the data connection.

sub_zero said:
by 3g you mean that i can use data only from 1 sim?
I have 2 sims from a networks that uses HSDPA 850 / 2100 - would both of the sims will work at the same time? (I don't need data on both of them, only on 1 sim, but i need reception for calls & sms on both sims)
Will it work?
Thanks!
Click to expand...
Click to collapse
yes, both sim cards can recieve calls/sms at any given point,
but for data, only one sim: either sim 1 or sim 2 ( whichever is choosen by you)

your answer!
sub_zero said:
I want to buy the I9192 and i wanted to know if it supports 2 sims that work only on 3g networks?
Or the second sim slot is only 2g?
Thanks!
Click to expand...
Click to collapse
I made all possible tests, it will only work 3g or hsdpa data speeds on slot 1. if you switch your data service network from SIM1 to SIM2 it will only work 2G, if you go back to SIM1 you will have 3G normally again.
hope this helps. BTW, in the Manual or user guide for this phone this feature is not clearly explained.

alexcaco said:
I made all possible tests, it will only work 3g or hsdpa data speeds on slot 1. if you switch your data service network from SIM1 to SIM2 it will only work 2G, if you go back to SIM1 you will have 3G normally again.
hope this helps. BTW, in the Manual or user guide for this phone this feature is not clearly explained.
Click to expand...
Click to collapse
no its not lyk dis...
I use Vodafone in sim 1 slot, use 2G
and reliance 3G in slot 2
No Problem at all...

both sim's works on 3g
alexcaco said:
I made all possible tests, it will only work 3g or hsdpa data speeds on slot 1. if you switch your data service network from SIM1 to SIM2 it will only work 2G, if you go back to SIM1 you will have 3G normally again.
hope this helps. BTW, in the Manual or user guide for this phone this feature is not clearly explained.
Click to expand...
Click to collapse
I confirm: both sims works on 3g but only one at a same time.
You have to mannually select which sim will use mobile data on settings > my device > sim manager > data service network.
If you choose sim2 for data, sim 1 will automattically switch to 2g network and sim 2 works on 3g.
Make sure your data provider has 3g coverage on your area.
hth

check my post on http://forum.xda-developers.com/showthread.php?t=2490419 for the solution.

Well both work in 3G but only the slot 1 works on HSDPA/HSDPA+ the second slot is locked into GPRS mode and I have experienced this behaviour on 4 rom before knox samsung proctection avoid me to flash my phone as I want.

dual sim standby - both 3g/4g ?

So I've read in a few reviews it's a dual sim standby (both sims are in standby for a phone call) and both of them are capable of 3g/4g at the same time?
anyone know?
reason I ask is in my country the 2g bands are closed so can't use any other dual sim phone (all of them force second sim to be on 2g)

I don't think both of them are capable of 4G for the simple reason 2 SIM from 2 different network providers = 2 IP address, and you need to know it's complex to make usable 2 IP address in the same time (MPTCP).
Then like on the OnePlus 2, you can only use one SIM for data and the other for phone calls/SMS/MMS in the same time.

The only phone that I am aware that is able to do 4g on one sim and 3g on the other is the mi5.
I am also keen to know if we can do the same on the one plus 3. I live in Singapore and 2g will be deactivated soon.
Sent from my X9009 using XDA-Developers mobile app

I'm not expecting the phone to use data on both. i'm more concerend about just being on standby for phone/msg on 3g (or 4 if possible). Like using your phone blocking data on the second sim. I don't see why it's so technologically hard. 2g is soon to be gone evrywhere

I have tested Mi5Pro and it have first sim 2G/3G/4G and the second sim 2G/3G simultaneously (dual sim stand-by).
I have read in a review than OP3 also. I will receive mine next monday, i will test ...

thanks a lot. anyone else can confirm ?

I can confirm .. i have received my op3 yesteday and it is 2G/3G/4G on sim1 and 2G/3G on sim2 simultaneously. Sim2 is only for calls and messages.
Like OP2 and other phones, it is possible to swap sims and in this case, sim2 is 2G/3G/4G with data and sim1 only 2G/3G for calls and messages.
I confirm also that op3 is dual sim stand-by and not dual sim active.

Le_Matriciel said:
I can confirm .. i have received my op3 yesteday and it is 2G/3G/4G on sim1 and 2G/3G on sim2 simultaneously. Sim2 is only for calls and messages.
Like OP2 and other phones, it is possible to swap sims and in this case, sim2 is 2G/3G/4G with data and sim1 only 2G/3G for calls and messages.
I confirm also that op3 is dual sim stand-by and not dual sim active.
Click to expand...
Click to collapse
So your SIM 1 is on 4G/LTE and SIM 2 can receive calls and text in 3G mode?

Yes but when call is made on SIM2, data on SIM1 is interrupted (dual stand-by)

Le_Matriciel said:
Yes but when call is made on SIM2, data on SIM1 is interrupted (dual stand-by)
Click to expand...
Click to collapse
Is this by design? That seems like a very frustrating limitation. I would be okay with data services flipping over to SIM2 while on the phone there.
I also seem to have a problem of the OP3 kicking down from LTE to HSPA when I make a phone call.
Any ideas?

appletalk said:
Is this by design? That seems like a very frustrating limitation. I would be okay with data services flipping over to SIM2 while on the phone there.
I also seem to have a problem of the OP3 kicking down from LTE to HSPA when I make a phone call.
Any ideas?
Click to expand...
Click to collapse
Yes, it is designed like this, like all dual sim except Asus ZenFone 2, Galaxy S4 Duo and few other models.
LTE networks has not "phone circuits" and call are made in 3G (phone connect in HSPA during call). This is for all LTE phones.
LTE calls are possible with VoLTE protocol witch is IP voice communications and not voice circuit.
For using VoLTE, the phone need compatible with this protocol AND operators needs to activate this functionality.

Le_Matriciel said:
Yes but when call is made on SIM2, data on SIM1 is interrupted (dual stand-by)
Click to expand...
Click to collapse
While you are using data on SIM1, will an incoming call on SIM2 ring on the phone or will the call be treated as though the phone is off-network and be directed to voicemail?

rickhuizinga said:
While you are using data on SIM1, will an incoming call on SIM2 ring on the phone or will the call be treated as though the phone is off-network and be directed to voicemail?
Click to expand...
Click to collapse
incoming call on SIM2 will ring.
Both the SIMS can receive calls no matter which of them are used for mobile data.
---------- Post added at 10:18 PM ---------- Previous post was at 10:01 PM ----------
spritey176 said:
So I've read in a few reviews it's a dual sim standby (both sims are in standby for a phone call) and both of them are capable of 3g/4g at the same time?
anyone know?
reason I ask is in my country the 2g bands are closed so can't use any other dual sim phone (all of them force second sim to be on 2g)
Click to expand...
Click to collapse
It is dual sim standby and both the sims are in standby for a phone call. Both of them are capable of 4G/3G/2G but NOT at the same time. 4G can be used only in one sim slot at a time. It can be set by going to settings > SIM cards> Preferred SIM for Cellular data. Whichever SIM you choose here will have 4G option. It can be changed from settings>Cellular networks > your SIM card > Preferred network type. (4G or 3G or 2G). The other SIM can have either 3G or 2G but there is no option to choose it. The only way is to click on 'Network operators' option from Cellular networks menu and choose a 2G or 3G service. Hope it helps.

I get 4g on each sim but you have to pick one for data but both are 4g

So if I have 2 sims, one for calls with 6gb 4g and one for data with 15gb 4g, when I finish the 6gb on 1st sim I can switch the data to the other sim via software? Thanks

Your right you can

Important about dual active
Le_Matriciel said:
Yes, it is designed like this, like all dual sim except Asus ZenFone 2, Galaxy S4 Duo and few other models.
LTE networks has not "phone circuits" and call are made in 3G (phone connect in HSPA during call). This is for all LTE phones.
LTE calls are possible with VoLTE protocol witch is IP voice communications and not voice circuit.
For using VoLTE, the phone need compatible with this protocol AND operators needs to activate this functionality.
Click to expand...
Click to collapse
This is true, but you can also add to the list of "Dual Active" phones all Huawei premium phones:
Mate 7, Mate 8, Honor 6, and probably Honor 7 and 8.
They all have DUAL ACTIVE SIM CARDS, which means that you can have a call on SIM-1 and get a waiting call on SIM-2, then you can answer the call and swap between the two active calls!! I even tried calling SIM-1 from SIM-2 and it was actually ringing!!
Also more importantly, when using data on SIM-1, you can make or receive a call on SIM-2 without interrupting data.
That's pretty amazing, but with a major drawback (at least for me, it is): 3G/4G service is only accessible on SIM-1 slot!! The SIM card in slot-2 will always be 2G and would never ever access 3G/4G networks
This is bad because I travel a lot, and I always need to be able to switch data from SIM-1 to SIM-2 and vice versa. The only option I have is to physically swap SIM cards between slots, which actually ruins the whole concept of having DUAL SIM mobile
My guess is that they are actually using two separate modems, each one is dedicated to one of the two SIM slots, and only one of them supports 3G/4G connectivity.

TheLoverMan said:
Your right you can
Click to expand...
Click to collapse
so, you are saying that both sims are 3G/4G capable, but can be used for data one at a time, and can be switched anytime via settings ?

I have a questión, so if a dual sim phone have 3g/4g capabilities on both sims, is there a way to make like a failover setup such as if sim1 looses data the phone switches to sim2 data automatically and viceversa?

I have problem in my one plus 3 network issues both SIM are not working properly both SIM search for network frequently when I switched data no network can anyone give solution I tried all rebooting, factory reset, searching network manually.

2nd SIM losing network when activating 1st SIM data [3.2.7 stock]

I am currently using 2 SIMs.
1. Vodafone 3G
2. Reliance Jio 4G LTE
Now when I set "SIM 1 (Vodafone)" as preferred SIM for Cellular Data, my 2nd SIM loses network.
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When I switch it to 2nd SIM, Both SIMs have network.
Anyone else have this issue? Whats the workaround?
I am on Stock 3.2.7 Rooted.

No idea, but u tried switching the Sims around in the sim tray.. maybe one is more suited to 4g than the other!?!
Sent from my ONEPLUS A3003 using Tapatalk

omkarroxx said:
I am currently using 2 SIMs.
1. Vodafone 3G
2. Reliance Jio 4G LTE
Now when I set "SIM 1 (Vodafone)" as preferred SIM for Cellular Data, my 2nd SIM loses network.
When I switch it to 2nd SIM, Both SIMs have network.
Anyone else have this issue? Whats the workaround?
I am on Stock 3.2.7 Rooted.
Click to expand...
Click to collapse
i use same sim cards and same slots as u and i have same problem. im in aicp nougat rom.
i dont think its because of our rom or phone. it maybe related to network too. checked on asus phone and it had the same issue

ohyesman said:
No idea, but u tried switching the Sims around in the sim tray.. maybe one is more suited to 4g than the other!?!
Sent from my ONEPLUS A3003 using Tapatalk
Click to expand...
Click to collapse
I will try that tomorrow morning. DOn't think it will make any difference though.
mkr2511 said:
i use same sim cards and same slots as u and i have same problem. im in aicp nougat rom.
i dont think its because of our rom or phone. it maybe related to network too. checked on asus phone and it had the same issue
Click to expand...
Click to collapse
Wow are you sure? If it is then its kind of a serious issue though.
I dont understand how it can be network related though?

omkarroxx said:
Wow are you sure? If it is then its kind of a serious issue though.
I dont understand how it can be network related though?
Click to expand...
Click to collapse
yes im sure. just switch the sim cards. put vodafone in sim 2 and jio in sim 1. now activate the jio for cellular network. if the problem is with phone or rom, the 2nd sim should lose network right? but it doesnt. it works fine. this problem is only seen with jio.
and i had the same issue while using in asus phone with other jio sim card and airtel

mkr2511 said:
yes im sure. just switch the sim cards. put vodafone in sim 2 and jio in sim 1. now activate the jio for cellular network. if the problem is with phone or rom, the 2nd sim should lose network right? but it doesnt. it works fine. this problem is only seen with jio.
and i had the same issue while using in asus phone with other jio sim card and airtel
Click to expand...
Click to collapse
So putting Vodafone in SIM 2, and then using Vodafone as preferred cellular data won't drop Jio's network? You tried this?

omkarroxx said:
So putting Vodafone in SIM 2, and then using Vodafone as preferred cellular data won't drop Jio's network? You tried this?
Click to expand...
Click to collapse
i've tried that too. it will drop the network.. jio needs to be chosen for cellular data to get network.
so its nothing related to phone or rom.

mkr2511 said:
i've tried that too. it will drop the network.. jio needs to be chosen for cellular data to get network.
so its nothing related to phone or rom.
Click to expand...
Click to collapse
But I dont get it still. We are choosing "Preferred Cellular Data" when data is turned on. Why does the whole network is lost just for choosing "preferred" option? How can this be network related.
Any ROM experts around?

omkarroxx said:
But I dont get it still. We are choosing "Preferred Cellular Data" when data is turned on. Why does the whole network is lost just for choosing "preferred" option? How can this be network related.
Any ROM experts around?
Click to expand...
Click to collapse
the reason behind this is jio doesnt have gsm or wcdma networks yet like other network operators. so it has to use lte for both data and calls. i hope u know how calls over lte work.
check the link below for explanation http://indianexpress.com/article/technology/tech-news-technology/reliance-jio-4g-volte-technology-heres-how-voice-calls-will-work/

mkr2511 said:
the reason behind this is jio doesnt have gsm or wcdma networks yet like other network operators. so it has to use lte for both data and calls. i hope u know how calls over lte work.
check the link below for explanation http://indianexpress.com/article/technology/tech-news-technology/reliance-jio-4g-volte-technology-heres-how-voice-calls-will-work/
Click to expand...
Click to collapse
You are not getting what I am saying.
I am not saying Jio should use GSM.
We are setting up "Preferred Cellular Data" which when turned on, it should use either Jio/Vodafone. We are not activating GSM network mode on Jio SIM. The thing you are saying is:
Edit: I understood what the problem is from other forum. Thanks for your input

omkarroxx said:
You are not getting what I am saying.
I am not saying Jio should use GSM.
We are setting up "Preferred Cellular Data" which when turned on, it should use either Jio/Vodafone. We are not activating GSM network mode on Jio SIM. The thing you are saying is:
Click to expand...
Click to collapse
bro seriously read that link 1st. it answers all your questions..

mkr2511 said:
bro seriously read that link 1st. it answers all your questions..
Click to expand...
Click to collapse
Yeah I did not know that in our phone we can only use 1 SIM active as data and other can not be used.
Thanks for your input.

When I roam around remote areas with weak Signal zone , I did experience what you are saying ... switching data and other sim signals would vanish . So I use to disable data first and later turn it on that way signals would stay . I.e.
Disable data
Switch sim data
Turn on data .
P.s. Everyone network has a fallback even if we don't use LTE ,networks fallback to device / network supported typed

omkarroxx said:
I am currently using 2 SIMs.
1. Vodafone 3G
2. Reliance Jio 4G LTE
Now when I set "SIM 1 (Vodafone)" as preferred SIM for Cellular Data, my 2nd SIM loses network.
When I switch it to 2nd SIM, Both SIMs have network.
Anyone else have this issue? Whats the workaround?
I am on Stock 3.2.7 Rooted.
Click to expand...
Click to collapse
Just for your info it has nothing to do with OP3 or any custom rom, It's JIO which h is an all time 4G network.
So when u chose data on any simcard apart rom the JIO the 4G band shifts to that particular sim be it idea Voda airtel, JIO will loose network as the band on that slot is 2g/3g.
Sent from my ONEPLUS A3003 using Tapatalk

no one can resolve.
ok,
faced same issue in my oneplus 3,
and it is there in every phone, and no one cant resolve it.
actually jio use its data network to make call, receive call and send sms, so if you change your network connection to any other sim, it will lose all its services.
so if you want to use both sim, your data connection must be connected with jio sim.

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.
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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.