Dual Sim problem

[Parasetanol]

Hi,

I use Dual Sim in S22 Ultra.

I use SIM2 just for calls, no data.

SIM1 is my main sim and I use it for everything, including mobile data.

Whenever I receice a call to SIM2, SIM1 loses mobile data connection. This happens immediately when the phone rings before I answer it and the mobile data stays disconnected until I hang up the phone.

I have tried many solutions:

Cleared SIM cache

Reset network settings

Reset phone settings

Changes SIM slotes

and so on...

[BaronDigo]

Lots of dual SIM phones dont allow connection on both sims . If one sim is using call service, the other cannot use data service.. This only works on the same sim if you want to use data and voice simultaneously.

[HootleTootle]

Yep, that's the way it works. The SIM not being used for the call goes in to standby. It's a chipset limitation, as there's only one modem, so it can't be connected to two different SIMs at the same time.

[Parasetanol]

Thanks for the replies.

If that's the case as Hootle and Baron mentioned, I wonder why the Samsung Support did not mention this. They see this as an issue and guided me to clean cache, reset settings and so on. Now I'm supposed to make an error log via *#9900# (SysDump) but that's a new whole problem for me because I get errors.

I've been contacting them two times, they try to find a solution, but their response time is a little too slow (two weeks and more).

[gixerob]

There are a few flavours of dual sim. Dual sim active, Dual sim passive, dual sim standby. Samsung need to make clear which one of its models has which.

[Ahmad_Gh]

I have the same problem on my S22, the connection is lost when using both sim's and usually my phone is out of reach, the mobile data connection is not stable, for example when i am using Whatsapp ,, after typing a message i need to wait for 20 seconds to see the notification that means the message is send.

Yesterday i installed the last update dated (January 1 2023) version S901EXXU2BVKM

the problem solved!! i am using the phone since yesterday with no problems, i am using sim 1 for calls and sim 2 for mobile data