Dual Sim: Calls on Sim2 don`t show up - General Questions and Answers

I have a very specific and very annoying problem:
Incoming calls on my SIM in Slot 2 don`t show up. Only upon the end of the call I get a notification of the missed call.
Incoming calls on SIM in Slot 1 work just fine.
Problem persists when changing SIM cards, Slot 2 wont show incoming calls. All notifications are turned on. Sometimes it rings, but shows no call - so no possibility to pick up.
Problem is solved when I delete the cache of the Telephone App, but reappear after a few days.
Any ideas what could cause this problem and how to get rid of it?
Device:
XIAOMI REdmi Note 9 Pro; MIUI 12.4.3; Android 11 RKQ1.200826.002
App:
Phone by Google 72.1.414558115

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[Q] How to automatically select a SIM for calls or texts on a DUAL SIM phone?

Hi,
I have a Xiaocai X9 dual sim phone. I have two sim cards with complementary contracts. The first sim comes with free texts and internet, while the second sim card comes with free calls. However, if I accidentally use the first sim card for calls or the second for texts and internet, it can get pretty expensive.
I use MIUI and often it automatically selects sim card 1 instead of 2 for calls. Therefore, I need a way to disable or block all outgoing calls on sim card 1 and ideally all outgoing texts and internet connections for sim card 2.
Please post here if you know a solution. Thanks!
Does anyone know a handset or app which allows you to restrict calls to small set of numbers, while allowing SMS to any number?
I've been playing around with my HTC Desire S, and you can use Fixed Dialing Numbers (FDN) to restrict calls to a small set of numbers, but that also restricts SMS to that same set of numbers.
I'm using miui v5. While making call it asks from which
Sim you want to place call. Also for sms while sending sms you get 2 options sim1 sim2 select appropriate option to send sms. I have not seen any song to set default option for sms/call
Ysaurabh85 said:
I'm using miui v5. While making call it asks from which
Sim you want to place call. Also for sms while sending sms you get 2 options sim1 sim2 select appropriate option to send sms. I have not seen any song to set default option for sms/call
Click to expand...
Click to collapse
I also use MIUI v5. There are certain scenarios when MIUI automatically starts a call with sim1 without the prompt. Furthermore, there is also the risk to accidentally select the wrong sim card for a call or a text message - as it happened to my once. I therefore still try to find a fool-proof solution - either an app or an OS.
Hi guys
I have the same problem and seriously want to solve this problem with miui v5 on TCL s950
when I'm trying to make a call from contacts list it use sim1 automatically!
If it haave any solution please help....

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