I moved your post to the appropriate English section.

This is impossible for every SIM on Telefonica/o2 network, VoLTE/WiFi Call does not have a switch on the network-side like you can’t opt of 2G or 3G calls on this side. May I know your special reason, maybe there is a different solution.

With good smartphones you can switch off WLAN calling, VoLTE and RCS. These are pure device settings and make less sense on the provider side or via SIM.

Turn it of 

.

Dear @handsetmonster ,

welcome here to our community.

Did the answers from @Klaus_VoIP , @Denner and @Droggelbecher help you? Thanks a lot for your fast and correct answers.

Kind regards,

Andrea

thanks for the  enthusiastic answers, I know that how to deactive VOLTE/VOWIFI from mobilephone.

I want to know that whether possible deactivate the volte / vowifi function from nerwork.

it’s a mistake in the detail description,  the corret is

how can i get sim without volte / vowifi for smartphone?

for some special reason, i need sim without volte / vowfi, but can use voice call, sms, mms and internet.

I am working as GCF certification engineer

https://www.globalcertificationforum.org/about.html

these are some test case that require special sim.

91.1.1.4

Default Bearer Activation - Unsuccessful (UICC Not Provisioned for VxLTE)  

92.1.1.7

VxWi-Fi Bearer Activation/Deactivation - Unsuccessful - UICC Not Provisioned for VxWi-Fi

I don’t think, that it is possible 

Why not? However, it is not a meaningful question to a consumer forum, but should be requested as a business letter from o2.