[Q] Dual sim feature? - General Questions and Answers

I wish to purchase a dual sim android phone (most likely samsung)
Is there an app/ or samsung dual sim phone which does the following...
if I wish to call a contact stored in sim memory of either sim card. the call will only be initiated from the sim card it is stored in..rather than giving me an option every time to choose a sim for calling.

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Dual Sim Question (L29)

It doesn't seem to matter how I set the default SIM in the Dual Management settings. The SIM physically installed in slot 1 will always make the calls. If I try to set calling default to SIM 2, it still goes to SIM 1. The only way I can make calls with the other SIM card is to physically swap them. Is it supposed to work this way? If so, what is the dual SIM management settings for?
I have a FreedomPop SIM in one and a T-Mobile one in the other.

Use Dual SIM version as a single SIM

So, I have the dual SIM version U11 (6GB/128GB). I mainly use it with a single SIM with no SIM card in SIM 2 slot. It is annoying that it would show all the related icons/details for SIM 1 even though there is no other sim. For example:
The signal icon always has a "1" above it.
SMS messages always have the SIM 1 icon next to them.
In the lock screen, the operator/carrier name has "(SIM card 1)" next to it.
Phone dialer call button has the SIM 1 name next to Call.
Call history enteries all have the SIM 1 icon next to them.
I thaught this was only supposed to happen when I have 2 SIMs, but I have it all the time. This is with the 1.13 & now 1.27.401.5 versions. I know Samsung does it the right way as with the S8+ there will be nothing shown when only 1 SIM is used.

Bind sim card to smartphone

I have Lenovo A Plus rooted by Supersu and plan to upgrade it to the pro version, in order to be able to set the pin-code to root-access. I have a task to make the SIM card binding to smartphones so that employees can not insert their SIM cards into them. Is it possible to do this? I mean, that the smartphone refuses to work with another SIM card.
Okay. I'll ask the question in a different way.
How in sh-script to get the serial number of the SIM card or phone number? If this is done, then I can put the script on the minute-by-minute execution and cyclically shutdown the phone if the SIM card number is not the one. Any ideas?

Carrier privileges not working on dual sim slot 2

Hi
I'm working on an app to automatically manage APN settings for my company's sim card.
I got it to work on single sim phones, and on dual sim phones if the sim is in slot 1.
When the sim card is in slot 2, I get an exception stating "No permission to write APN settings"
Has anyone ran into this / has any idea of why the different behaviour from slot1 to slot2?
Thanks.

Hiding Active 4G Network (Dual SIM Phone)

Hi
I have made some research but can't find any.
I have a huawei nova 5t; dual sim phone. both sim cards are active, one is used for making/receiving calls and the second sim card is only for 4G mobile data.
I'd like that on the notification panel, only 1 sim notification is shown and hiding the second active sim network (for the data).
bottom line, both sim card will be active.
any idea how to do it. thanks.

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