Hi,
until now I could initiate conference calls and merge calls into a single one.
With the new dual sim iPhone everything works fine except that I cannot add a second call to an existing one. This is not working even though the second call is initiated from the same line.
Thanks for help!
iPhone XR
Depending on your carrier and the type of cellular data connection, it's possible that this feature may not be supported by their network: About cellular data networks.
Thanks, Starr.C!
Meanwhile, the carrier I'm having this issue with (Congstar Germany) confirmed that this feature is only supported in their post-paid contracts.
Hi Matthias Wobben,
Thank you for using the Apple Support Communities. I see you're running into issues setting up a conference call.
To clarify, does this happen when you call using both lines on your iPhone, or only one? Have you been able to make conference calls using this specific carrier before? Depending on your carrier and the type of cellular data connection, it's possible that this feature may not be supported by their network: About cellular data networks.
On the other hand, if you've been able to initiate a conference call using this carrier previously, I recommend starting with a restart and then testing again: Restart your iPhone, iPad, or iPod touch.
You might also check for updates by tapping Settings > General > Software Updates. If any are available, How to back up your iPhone, iPad, and iPod touch and Update your iPhone, iPad, or iPod touch.
I hope this helps get you started.
Take care.
Hi Matthias Wobben,
We appreciate you replying back with that information. Glad to hear we were able to be of assistance.
Thank you!
iPhone dual SIM conference calls
