Database Users

SIM 2 voice problem solved for Cm12 rom on Galaxy Grand 2(Temporary)

Today i am showing u how to fix sim 2 voice bug on cm12 rom.
Im currently using cm12 rom v3.2
I hope my trick will be work in all kind cm12 version rom which built by mukulsoni.
1st i wanna told u that trick is temporary fix for voice by switching 3g on "preferred network type"
I mean only 3g network type could be use voice on both sim.
Go to setting>
click mobile networks and then click sim 2
Switch preferred network type on 3g.
Now call someone for test.
Remember one thing,
Both sim voice will be work by switching on 3G type network.
For more help plz watch this video.
https://youtu.be/HPd97P3JvgQ
Hit the thanks button if u helped from me

still not working

not working plz do some thing

Dual Sim not working. Only one sim works at a time

After making some changes in service menu, i am unable to use dual sim functionality. I can use only one sim slot at a time. The other one shows no network available. Regardless of which sim slot i use. In service menu sim slot 1 can be set to any preferred network but sim slot 2 is stuck in gsm only mode. Manually searched for network but no network available. Flashed latest oos 3.1.0,still the same issue. Can anyone help me with this.
Thanks in advance

Just restore whatever change you did in service menu and you should be back, you should not have played around in there from the beginning ?

pitrus- said:
Just restore whatever change you did in service menu and you should be back, you should not have played around in there from the beginning ?
Click to expand...
Click to collapse
Service menu doesn't have an option to reset to default and i don't remember exactly what changes i made. Yea i shouldn't have touched the service menu. If there's any thing else that can be done. Thanks for the quick reply

I think you changed radios to be only 3g/4g and your carriers uses the same band
Sent from my ONE A2005 using Tapatalk

fburgos said:
I think you changed radios to be only 3g/4g and your carriers uses the same band
Sent from my ONE A2005 using Tapatalk
Click to expand...
Click to collapse
I'm not sure what changes I've made but yes both providers use band 40 2300 mhz for lte. I've tried changing one of the sim to use only 2g so that both sims are on different band but still same issue.

If you are in an area where carrier uses exclusively LTE that's the problem, opt radio is dual standby it alternate between two signals in any of the combinations 2g-3g/lte but not 3g-3g or lte-lte
Sent from my ONE A2005 using Tapatalk

fburgos said:
If you are in an area where carrier uses exclusively LTE that's the problem, opt radio is dual standby it alternate between two signals in any of the combinations 2g-3g/lte but not 3g-3g or lte-lte
Sent from my ONE A2005 using Tapatalk
Click to expand...
Click to collapse
My phone was working fine few days ago. I messed up something in service menu, after that the problem started. I have set one of the sim to use 2g manually, still i can't find any signal and both carriers use 3 different bands.

Have you found any solution i am facing exact same issue after changing network band. please help

fburgos said:
I think you changed radios to be only 3g/4g and your carriers uses the same band
Sent from my ONE A2005 using Tapatalk
Click to expand...
Click to collapse
How to reset radio band i am facing same problem. I tried factory reset, restore old twrp EFS backup, clean flashing stock rom, flashing cm14.1. But problem is still there please help.

Finally......
Hello guys i solved this issue by flashing oxygen os 2.2.0 now my both sim are working fine.
Just flash oxygen os 2.2.0 which has dual SIM preference selection fix.

shan1990 said:
Finally......
Hello guys i solved this issue by flashing oxygen os 2.2.0 now my both sim are working fine.
Just flash oxygen os 2.2.0 which has dual SIM preference selection fix.
Click to expand...
Click to collapse
No wifi, no simcards detected...

Can you explain how it makes it work?

Here is a good read about such dual-sim issues (esp. posts #3,4):
https://forums.oneplus.net/threads/dua-sim-detection-problem-only-one-sim-being-detected.430976/

I'm a noob with this stuff, I read that forum and I'm still unclear... Is there a work around or am I screwed? Is it the phone/Software or my sim cards?

Here is the solution
In order to solve the problem go to service menu by dialing *#*#4636#*#* then turn off radio then select radio band 32 when it says successful, restart your phone and the problem will be solved
Say thanks at fb.com/suri131
You can contact for any other issue too

Finally solved the issue
I too faced similar issue and solved it now. I'll share my observations here.
I had 2 4g Sims Airtel and Jio. Jio for data. Both the sim's were working fine , once i went into roaming suddenly after that airtel stopped latching to network. Whatever sim slot i put my airtel sim it's not getting network if in the other slot Jio is there. I tried to use my airtel sim in other phones and it's working fine. I tried putting only airtel sim it's working fine in my OP2. I thought this may be imei problem and checked imei , my OP2 has both imei in it.
So now the fix part , for me 4g sim was working fine so tried fixing the other one in sim slot 1 i.e.. airtel.
*Install and open Shortcut Master(Lite).
*Menu->Search->Type "Engineering" -> Select "EngineerMode" from Search result (package name:com.android.engineeringmode.EngineeringMode) ->Launch.
*Click Network Set
*Click Sim Card Select -> sim 1
*Click Rat mode ->Select GSM only
*Click band mode->Select PGSM 900/1800
Now turn on Airplane mode on /off wait for a minute you should see both network.
Summary: In OP2 one slot will be 4g / other will be GSM 2g... So whichever sim is working for you don't change settings for that sim , play with the other sim for which no network is coming.

Abidbhat said:
Finally solved the issue
I too faced similar issue and solved it now. I'll share my observations here.
I had 2 4g Sims Airtel and Jio. Jio for data. Both the sim's were working fine , once i went into roaming suddenly after that airtel stopped latching to network. Whatever sim slot i put my airtel sim it's not getting network if in the other slot Jio is there. I tried to use my airtel sim in other phones and it's working fine. I tried putting only airtel sim it's working fine in my OP2. I thought this may be imei problem and checked imei , my OP2 has both imei in it.
So now the fix part , for me 4g sim was working fine so tried fixing the other one in sim slot 1 i.e.. airtel.
*Install and open Shortcut Master(Lite).
*Menu->Search->Type "Engineering" -> Select "EngineerMode" from Search result (package name:com.android.engineeringmode.EngineeringMode) ->Launch.
*Click Network Set
*Click Sim Card Select -> sim 1
*Click Rat mode ->Select GSM only
*Click band mode->Select PGSM 900/1800
Now turn on Airplane mode on /off wait for a minute you should see both network.
Summary: In OP2 one slot will be 4g / other will be GSM 2g... So whichever sim is working for you don't change settings for that sim , play with the other sim for which no network is coming.
Click to expand...
Click to collapse
it worked instantly

Abidbhat said:
Finally solved the issue
I too faced similar issue and solved it now. I'll share my observations here.
I had 2 4g Sims Airtel and Jio. Jio for data. Both the sim's were working fine , once i went into roaming suddenly after that airtel stopped latching to network. Whatever sim slot i put my airtel sim it's not getting network if in the other slot Jio is there. I tried to use my airtel sim in other phones and it's working fine. I tried putting only airtel sim it's working fine in my OP2. I thought this may be imei problem and checked imei , my OP2 has both imei in it.
So now the fix part , for me 4g sim was working fine so tried fixing the other one in sim slot 1 i.e.. airtel.
*Install and open Shortcut Master(Lite).
*Menu->Search->Type "Engineering" -> Select "EngineerMode" from Search result (package name:com.android.engineeringmode.EngineeringMode) ->Launch.
*Click Network Set
*Click Sim Card Select -> sim 1
*Click Rat mode ->Select GSM only
*Click band mode->Select PGSM 900/1800
Now turn on Airplane mode on /off wait for a minute you should see both network.
Summary: In OP2 one slot will be 4g / other will be GSM 2g... So whichever sim is working for you don't change settings for that sim , play with the other sim for which no network is coming.
Click to expand...
Click to collapse
Hey man. Installed a custom based on android 12 and i'm not sure what happened but only one sim card was working. Used msm tool to go back to oos 12 and now only one sim card shows.
Was going to try your method but the "engineeringmode" does not show up in search.
Any suggestions?

How May I reused to any SIM in my Galaxy note 4 after used JIO 4G

Sir ,
I am using Jio 4G sim card in my Note 4 , but if i change and insert any other oprater sim then its showing network but i cant make a call and send a massage or use Internet. I was inform to customer service then they told me that your have used Jio Sim so nothing any options to recover it. So please anybody please guide me properly . Help me please .

You can use any sim. When you change your jio sim, makeep sure that you have selected auto in network mode instead of lte only at the same time you have to select the correct apn in Internet settings. Jio sim will not lock lock your phone to that network. .. using jio on note 4, j7 2016, j2...without any issues

SIM Slot 2 - No Network

Hi Everybody,
I am stuck with my OP2 OOS 3.5.6.
So after i got the 3.5.6 i was not able to get VOLTE. So i found a resolution on the OP2 forum:
They advised to downgrade to 3.1.0 and then to upgrade to 3.5.6, did that and was able to get VOLTE, but another issue started, as in India Jio is a 4g service and I read somewhere that we will have to use it in SLOT 1 , so i did the same, and Vodafone in SLOT 2.
When i did that Jio works fine but there is no network for Vodafone.
After that i have tried the following:
*Selecting network manually.
*Changing the band.
*Reinstalling the OS.
*Resetting the network settings.
*Wiping out data and cache.
Nothing worked for me, can somebody suggest me something.

Rootleopard said:
Hi Everybody,
I am stuck with my OP2 OOS 3.5.6.
So after i got the 3.5.6 i was not able to get VOLTE. So i found a resolution on the OP2 forum:
They advised to downgrade to 3.1.0 and then to upgrade to 3.5.6, did that and was able to get VOLTE, but another issue started, as in India Jio is a 4g service and I read somewhere that we will have to use it in SLOT 1 , so i did the same, and Vodafone in SLOT 2.
When i did that Jio works fine but there is no network for Vodafone.
After that i have tried the following:
*Selecting network manually.
*Changing the band.
*Reinstalling the OS.
*Resetting the network settings.
*Wiping out data and cache.
Nothing worked for me, can somebody suggest me something.
Click to expand...
Click to collapse
If you remove the Jio SIM and leave the Vodafone SIM in slot 2 does it connect to the network?
Does the Vodafone network support 2g?

Spannaa said:
If you remove the Jio SIM and leave the Vodafone SIM in slot 2 does it connect to the network?
Does the Vodafone network support 2g?
Click to expand...
Click to collapse
Nope, even if I remove the Jio Sim and just have the Vodafone Sim in the second slot still it does not show up.

Rootleopard said:
Nope, even if I remove the Jio Sim and just have the Vodafone Sim in the second slot still it does not show up.
Click to expand...
Click to collapse
You only answered one question!
Does the Vodafone network support 2g?
Does the Vodafone sim work in slot 1?
Does your SIM 2 have an IMEI in settings > about phone > status IMEI info?

Spannaa said:
You only answered one question!
Does the Vodafone network support 2g?
Does the Vodafone sim work in slot 1?
Does your SIM 2 have an IMEI in settings > about phone > status IMEI info?
Click to expand...
Click to collapse
Yes Vodafone does support 2g but when I select 2g and the Sim in the slot 2 it does not work.
Yes the Vodafone does work fine with 3g and 2g network in slot 1.
Yes the Sim 2 does show the imei number under settings.

You can select vodafone in slot 1 with 2g then put jio in slot 2 and select 4g as the 1+2 has dual LTE standby so jio should work fine on slot 2

ItsmYarD said:
You can select vodafone in slot 1 with 2g then put jio in slot 2 and select 4g as the 1+2 has dual LTE standby so jio should work fine on slot 2
Click to expand...
Click to collapse
Does really op2 has dual stand by, as I am not able to get volte and I have the Jio in slot 2.
Also I contacted op2 customer care and they mentioned that it will only support one 4g and other will be only 3g.
Does it work for you if yes can you please let me know what are the settings you have.

Rootleopard said:
Does really op2 has dual stand by, as I am not able to get volte and I have the Jio in slot 2.
Also I contacted op2 customer care and they mentioned that it will only support one 4g and other will be only 3g.
Does it work for you if yes can you please let me know what are the settings you have.
Click to expand...
Click to collapse
Dual sim standby works fine for me but I'm not a Jio user.
OnePlus support are wrong, If your data sim is 4g, the other drops to 2g not 3g.
Not sure what your issue is though as I've only heard of it affecting some (but not all) Jio users.

Spannaa said:
Dual sim standby works fine for me but I'm not a Jio user.
OnePlus support are wrong, If your data sim is 4g, the other drops to 2g not 3g.
Not sure what your issue is though as I've only heard of it affecting some (but not all) Jio users.
Click to expand...
Click to collapse
You both are right they did mention 2g,my mistake that I mentioned 4g.
Yes I got a few users who mentioned the same of not getting network in the second slot. I did got a hint from somebody that it might be an issue with the update and a fix is in the pipeline. But again its just a hint and not sure.
Thanks a lot for all the help.

[HELP] Can't make calls on Slot1 after oreo (Data, Msg's work)

Hi Everyone,
I've been having this issue since a week or so(after oreo). I can't make make calls if i put my Idea 4g sim on slot1. Internet and messages works fine. No issues on slot2. Will appreciate any help thanks

jashd7 said:
Hi Everyone,
I've been having this issue since a week or so(after oreo). I can't make make calls if i put my Idea 4g sim on slot1. Internet and messages works fine. No issues on slot2. Will appreciate any help thanks
Click to expand...
Click to collapse
There could be 3 possible ways.
1) Software bug
2) sim slot pin breakage
3) sim card chip problem
Identify the root cause at first.

hemanth_gunasekaran said:
There could be 3 possible ways.
1) Software bug
2) sim slot pin breakage
3) sim card chip problem
Identify the root cause at first.
Click to expand...
Click to collapse
2nd and 3rd not possible. Since data and messages are working.
Can you provide more information.
Are you on 4g network.
What type of error do you get.
Your circle.
Have you changed your network settings using *#*#4636#*#*?
Have you tried calling using 3g and 2g only?
If not choose WCDMA only (use above code). Also try with GSM only.
!dea user here since a long time(familiar with all their problems and solutions)
Please answer above all questions in as much details as you can.
Please keep in mind that it can be an software bug

alkesh95 said:
2nd and 3rd not possible. Since data and messages are working.
Can you provide more information.
Are you on 4g network.
What type of error do you get.
Your circle.
Have you changed your network settings using *#*#4636#*#*?
Have you tried calling using 3g and 2g only?
If not choose WCDMA only (use above code). Also try with GSM only.
!dea user here since a long time(familiar with all their problems and solutions)
Please answer above all questions in as much details as you can.
Please keep in mind that it can be an software bug
Click to expand...
Click to collapse
Thanks for the reply man really appreciate it
Problem solved after i used Airtel SIM in that same slot for some time. Now my idea sim is working again. Thankx

Hey.... i have same problem.....i tried 2 different airtel sim .....they are working
alkesh95 said:
2nd and 3rd not possible. Since data and messages are working.
Can you provide more information.
Are you on 4g network.
What type of error do you get.
Your circle.
Have you changed your network settings using *#*#4636#*#*?
Have you tried calling using 3g and 2g only?
If not choose WCDMA only (use above code). Also try with GSM only.
!dea user here since a long time(familiar with all their problems and solutions)
Please answer above all questions in as much details as you can.
Please keep in mind that it can be an software bug
Click to expand...
Click to collapse
Hey.... i have same problem.....i tried 2 different airtel sim .....they are working fine in sim slot 2 but having problem in making outgoing calls while placed in sim slot 1. Data network and messages working fine but no outgoing calls.
As u told about *#*#4636#*#* its shows UTMS in voice network
Please help.....sim company saying it handset problem and handset company saying it sim problem.......... my handset is xiomi redmi note 4

My sim is working but I am not messages and calls are not working.
i have updated my mi a1 in pie. now i am not able to use calling and messaging.

kk2150 said:
i have updated my mi a1 in pie. now i am not able to use calling and messaging.
Click to expand...
Click to collapse
Same problem here. Solution for now is to change to 2G network, at least for me. When I try to call with 4G preferred sometimes it work, but when it works they can't hear me and I have to scream. This Pie update have so many bugs it is ridiculous. I can't believe they put such ****ty update to the masses it seems like BETA version. In Oreo when making call phone switches from 4G to 3G instantly now in Pie switches worry slow if it even switch and the signal is so bad that the call drops and that is in places where the signal is perfect

Hi, since last 4 days i am facing same ptoblem cellular SIM in slot 1 not working for incoming and outgoing calls and outgoing sms but internet and sms service (invoming) is working perfect on 4G
When i switch it to 3G/2G it shows no signals
But when i inserted this same sim in slot 2 all things work perfect. same problem occurred even when i inserted other network sim in slot 1 (internet and sms(incoming) worked but unable to do calls) I had factory reset but problem not solved
I am using poco x3 nfc
I anyone have solution plz tell me