Merge call/conference call issue

[Frank B]

My Galaxy S24 on T-Mobile wont merge or initiate conference calls. I get an error message can't place call on hold then when I try to swap back to the original call it just hangs up on both calls. I've contacted T-Mobile they walked me through a few steps, clear cache and data which worked for the next immediate call.  This has been going on for some time now and I'm getting pretty frustrated. 

[arianwen27]

This is a uk forum and by "t-mobile" I'm assuming your american. So we might not be able to help as much as the american forum.

I do see you aren't using wifi calling though, while being on WiFi. Try turning WiFi calling on. HD+ means VoLTE is being used, but if you're on WiFi, you can enable WiFi calling

[ChrisP88]

Hello and welcome to the Community @Frank B !

Although you are welcome to post here, you may find it more beneficial to discuss this with our Samsung Community in the US. I will put a link below for you:

https://us.community.samsung.com/t5/Samsung-Community/ct-p/us?page=1&tab=recent_topics