Need help, dual SIM (standby) intermittent "no network connection" - Android Q&A, Help & Troubleshooting

Trying to solve a problem for a customer at work, dual SIM standby device (kazam trooper) experiencing problems on one SIM only, when trying to make outbound calls, only works roughly one in ten times. 90% of the time will get "not connected to network" error. Incoming calls are always fine, and inbound.amd outbound texts also working okay. No issues with mobile data. Previously worked fine for outbound calls. Nothing changed, SIMs still I'm same slots. Ran through SIM management and mobile network settings with a fine tooth comb. Unable to find anything obvious.
Out my.depth with dual.sim, please help. Could having mobile data enabled on SIM2 affect SIM1 ability to make calls?

Sometimes new upgraded sim card is a solution. Ask operator for replacement its free of charge.

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MMS on sim not used for Data

Hi everyone. This is my first dual sim phone so please be patient if this is common knowledge, but I tried to search and couldn't find anything. My device is a Mido, running Pixel expereince. I also posted in the thread for that ROM, but I'm not sure if it's a ROM issue or I'm just missing something so I am posting here as well.
I have the phone set up to use sim 1 for calls and sms, and sim 2 for data. But when it is set like this sim 1 cannot send or receive mms. When I try to send an mms it just stays stuck on sending but never goes through, and when I need to receive an mms, it says downloading but never downloads. If I toggle to use sim 1 for data, the mms then goes through or is downloaded.
On other phones, when I try to send an mms, even when I am on wifi, the H+ signal comes on briefly for the data to go through for the mms. What I have now is the x above the signal indicator for sim 1 never goes away while trying to send or receive mms, meaning the phone never attempts a data connection on that sim, unless I toggle the switch to use data on that sim..
Is there a solution? Is this how dual sim phones always works or is it a problem of the ROM?
Thanks in advance.

Jio sim "mobile network not available" please help me with this

Hello guys,
I am facing a real big issue after updating to the stable android pie release on my poco f1
I am using a jio sim. The incoming calls are not shown on the phone. Whenever a call comes to my number it never shows on the phone the caller will hear the dialer tone as normal
Also when I try to make a call it shows a message mobile network unavailable, mobile data and sms works fine all this time.
When I reboot the phone none of the issues are there for 15 to 20 minutes then it comes back.
There were no issues when i put the sim in the second sim slot but I need to have the same card.
I am really frustrated about this issue, I have missed many important calls as it never showed up on the phone
I cannot find any one else facing this issue. What could be the reason for this ? I hope it's some kind of software bug that can be fixed.
Please help me to fix this guys
Thank you

Jio sim "mobile network not available"

Hello guys,
I am facing a real big issue after updating to the stable android pie release on my poco f1
I am using a jio sim. The incoming calls are not shown on the phone. Whenever a call comes to my number it never shows on the phone the caller will hear the dialer tone as normal
Also when I try to make a call it shows a message mobile network unavailable, mobile data and sms works fine all this time.
When I reboot the phone none of the issues are there for 15 to 20 minutes then it comes back.
There were no issues when i put the sim in the second sim slot but I need to have the same card.
I am really frustrated about this issue, I have missed many important calls as it never showed up on the phone
I cannot find any one else facing this issue. What could be the reason for this ? I hope it's some kind of software bug that can be fixed.
Please help me to fix this guys
Thank you
Factory reset, install the new update 10.1.3.0 from sd card.

Sim & Mobile Network issues

I am using POCO F1 mobile and have sim inserted in both slots. At times the second sim gives the notification as mobile is switched off when someone calls me. They call in my first sim and inform my second number is switched off. If I check my device I could see indication for full signal. I generally re-start my device and this activates the second sim and I get missed call notificaiton.
What could be reason for this. I feel I am missing some important calls as my second number is used for professional connects.

Redmi Note 9 Pro Stops Making Or Receiving Calls (Jio 4G Sim)

So this problem has been persisting for over a year now. I live in an area with great connectivity. All my family members have Jio sims and have never faced a problem.
Problem: I have two Jio sims in my phone. Sometimes my phone becomes unreachable or says 'number is switched off' when someone tries calling. If I try calling, it just shows call ended. The signal strength is always full and mobile data also works.
Restarting the phone or putting the phone in airplane mode and then back solves the issue.
Sometimes someone would call me, the phone would ring but I won't receive the call and then my phone would ring 30 minutes later and when I press answer, the app would hang.
Solutions I have tried:
- Factory reset my phone 3 times.
-Bought a new Sim
-Volte and WiFI calling is enabled, tried disabling also, but doesn't work
-Tried keeping Dual 4G on, it didn't work, tried turning off, it didn't work
Still problem is persisting
Please help, I don't have money for a new phone and I'm in the middle of job searching and I can't afford to miss recruiter calls
Jade1235 said:
So this problem has been persisting for over a year now. I live in an area with great connectivity. All my family members have Jio sims and have never faced a problem.
Problem: I have two Jio sims in my phone. Sometimes my phone becomes unreachable or says 'number is switched off' when someone tries calling. If I try calling, it just shows call ended. The signal strength is always full and mobile data also works.
Restarting the phone or putting the phone in airplane mode and then back solves the issue.
Sometimes someone would call me, the phone would ring but I won't receive the call and then my phone would ring 30 minutes later and when I press answer, the app would hang.
Solutions I have tried:
- Factory reset my phone 3 times.
-Bought a new Sim
-Volte and WiFI calling is enabled, tried disabling also, but doesn't work
-Tried keeping Dual 4G on, it didn't work, tried turning off, it didn't work
Still problem is persisting
Please help, I don't have money for a new phone and I'm in the middle of job searching and I can't afford to miss recruiter calls
Click to expand...
Click to collapse
My phone just started having this same issue. I have a redmi note 9s
Jade1235 said:
So this problem has been persisting for over a year now. I live in an area with great connectivity. All my family members have Jio sims and have never faced a problem.
Problem: I have two Jio sims in my phone. Sometimes my phone becomes unreachable or says 'number is switched off' when someone tries calling. If I try calling, it just shows call ended. The signal strength is always full and mobile data also works.
Restarting the phone or putting the phone in airplane mode and then back solves the issue.
Sometimes someone would call me, the phone would ring but I won't receive the call and then my phone would ring 30 minutes later and when I press answer, the app would hang.
Solutions I have tried:
- Factory reset my phone 3 times.
-Bought a new Sim
-Volte and WiFI calling is enabled, tried disabling also, but doesn't work
-Tried keeping Dual 4G on, it didn't work, tried turning off, it didn't work
Still problem is persisting
Please help, I don't have money for a new phone and I'm in the middle of job searching and I can't afford to miss recruiter calls
Click to expand...
Click to collapse
Try reinstalling the firmware

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