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.

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

4g and Mobile Data switch

Hey guys! So I encountered this thing today.
Jio is 4g only network and generally it offers good connectivity but in certain areas it's not that good!
So I went to settings and thought of switching my mobile data to the 2nd sim which is an airtel 4g sim.
Now airtel is 2g/3g/4g network!
But turns out if you have to switch your data to second sim, it will enable 4g on that sim and your Jio 4g only sim is hanging with no network at all!
So it seems there is no way you can keep one of your sim on 4g and use 3g network mobile data on other sim!
Is anyone having a solution to this?

aKp1 said:
Hey guys! So I encountered this thing today.
Jio is 4g only network and generally it offers good connectivity but in certain areas it's not that good!
So I went to settings and thought of switching my mobile data to the 2nd sim which is an airtel 4g sim.
Now airtel is 2g/3g/4g network!
But turns out if you have to switch your data to second sim, it will enable 4g on that sim and your Jio 4g only sim is hanging with no network at all!
So it seems there is no way you can keep one of your sim on 4g and use 3g network mobile data on other sim!
Is anyone having a solution to this?
Click to expand...
Click to collapse
a update is relesing this week , i think it should fix the bug.
the update will starts on 25,26,27 of this month

Also ViLTE is not supported!
And since this last week, 4g speeds have gone crap both in JiO and Airtel. Can't even stream a youtube video at 360p.

aKp1 said:
Also ViLTE is not supported!
And since this last week, 4g speeds have gone crap both in JiO and Airtel. Can't even stream a youtube video at 360p.
Click to expand...
Click to collapse
simply wait for the update bro

I am too facing the same problem with my jio and Vodafone sim. I am trying to switch my Vodafone data on but not able to do so without disabling the jio sim. Has a fix been already released?

mercy1910 said:
I am too facing the same problem with my jio and Vodafone sim. I am trying to switch my Vodafone data on but not able to do so without disabling the jio sim. Has a fix been already released?
Click to expand...
Click to collapse
I think you can't use data on both sim cards at the same time

PalakMi said:
I think you can't use data on both sim cards at the same time
Click to expand...
Click to collapse
Bro are you kidding no one can do like that.

I know, that's not possible now.

Yes ,

VOLTE(SIM-1) & 4G Data(SIM-2) Not Possible?!

Hey guys,
Just yesterday I came to know of this annoying problem with our device. For context, I use Jio as SIM-1 and Airtel as SIM-2. So what I was trying to achieve is to use 4G data from SIM-2 while SIM-1 was 4G & VOLTE enabled. But the irritating thing is this configuration as far as I tried not possible. Even searched all over XDA and ZUK forums for our phone and still no solution. While SIM-1 is the Data SIM, SIM-2 can still be 4G (but what's the frickin purpose). But When SIM-2 is the Data SIM, SIM-1 can't be 4G or have VOLTE flag. Then I thought if this is problem might be over if I interchange the SIMs in the slots. Now SIM-1 is Airtel and SIM-2 is Jio. Now also if I set SIM-1 to be Data SIM, Jio doesn't receive any frickin signal or VOLTE Flag. If Someone can please help me solve this problem, it would be very much helpful. Or I would like to know whether this problem is with a particular ROM only. I Run RR 5.8.4 with latest basebands and Darkmoon Kernel. Please Someone Help me with this.

Bro it's the same for any phone none have dual 4g standby and as you switch data sims the Airtel switches to 4g while jio gets downgraded to 3g where it can't work properly

spandu500 said:
Bro it's the same for any phone none have dual 4g standby and as you switch data sims the Airtel switches to 4g while jio gets downgraded to 3g where it can't work properly
Click to expand...
Click to collapse
But dude when I have Jio as my Data sim, airtel is receiving 4G. I double checked that.

Incrovantilist said:
But dude when I have Jio as my Data sim, airtel is receiving 4G. I double checked that.
Click to expand...
Click to collapse
I can confirm that.

And also I've checked three other phones (Oneplus 2, Mi Max, Le 2) where the phones donot completely lose signal (though happens rarely but a reboot rectified it). I think this is more of a ROM based feature than a hardware incapability. If anyone can confirm that this particular configuration of SIMs work on any other phone(s), we could probably port that feature atleast as a Magisk Module.

This is not a phone or ROM problem...its just that jio doesnt want users to use free voice while they are using different carrier for data!

Mi a1 getting dual volte feature via new software updates, so can't we?

Dual volte is successfully implemented on mi a1 with software and ours is SD 820 I think we can also enable it

Incrovantilist said:
But dude when I have Jio as my Data sim, airtel is receiving 4G. I double checked that.
Click to expand...
Click to collapse
Most 4g have backward support 3g.. so even though the phone is latched on to 4g it is actually connected to 3g bands.. true volte is only jio.. if volte switch is off and you are still making calls then it's backwards 3g that is gsm network

Incrovantilist said:
But dude when I have Jio as my Data sim, airtel is receiving 4G. I double checked that.
Click to expand...
Click to collapse
For me jio is volte first sim and Vodafone LTE on second sim.

can someone confirm me if airtel VoLTE is supported in their z2 plus even on single sim? I asked customer support of airtel and they said that our phone does not support VoLTE feature of airtel.

Internet disconnect while calling

Hi,
I m using jio as sim 1 and idea as sim 2. Both have 4g network and volte enabled. I m using sim 1 for internet. My problem is while call using idea, the internet not working. Since both sim having volte and the device having dual 4g function, why this is happening.?

rinto4u said:
Hi,
I m using jio as sim 1 and idea as sim 2. Both have 4g network and volte enabled. I m using sim 1 for internet. My problem is while call using idea, the internet not working. Since both sim having volte and the device having dual 4g function, why this is happening.?
Click to expand...
Click to collapse
Never happened to me. (SIM1: Jio 4G; SIM2: Airtel 4G)

Rowdyy Ronnie said:
Never happened to me. (SIM1: Jio 4G; SIM2: Airtel 4G)
Click to expand...
Click to collapse
Have you done any settings as I'm also having the same thing, however, I've no issue with that but just curious to know?