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I switched from AT&T this morning on my iPhone 13 and got the same message when I tried to call a half dozen numbers that are known to be working. My iPhone 13 has an AT&T virtual SIM that had not yet been deactivated. My Xfinity Mobile account is activated, and I made it my primary carrier. I got this error message for any calls I made for the first 10 minutes after inserting my xfinity SIM. After 10 minutes, the error went away and I was able to make calls normally.

I am also having the same problem 

It happened to me today during a call

I am having same problem. Now I am on the call with 3rd representative....

I've spent about 40 minutes with a two people in an off-shore call center and they're very courteous but had unable to help with the technical problems.

They had me reset all my settings which is problematic.

Now they're telling me I need to have another phone at hand so they can troubleshoot my phone. This is bizarre.

After 4 customer service reps over 2-1/2 continuous hours, I went over the to Verizon store and it took nearly another 2 hours to restore my business with them to get my phone reactivated, as Xfinity Cellular said that they weren't able to solve the issue after having me restart the phone several times, take out and reinstall the SIM card, stand in my backyard in the cold and repeat these steps even though I told them that I had 4 bars and the cell tower was a block from my house. The said the highest tier of support was reached for the day but someone would get back to me within 72 hours to troubleshoot. I lost a day of work because of this mess. My son said, "Why would you sign up for a cell phone carrier who doesn't have a proven track record." Smart kid.

I spent more than 2 hours talking to reps after I got the same message. Very, very frustrating. The problem is still there the next day. Havoto navigate the gate keeper recording who insists I do automated fixes that I have done twice two days ago is even more frustrating. 15 minutes to get to a live person, junior in the chain of command and needing to explain what all the more senior techs have tried to do is also frustrating. Three days without being able to make an outgoing call is long enough. [Edited: "Language"]

I am having this same issue ! I had no problems for 2 days then I charged my phone with a charger from my old phone that was from my Verizon phone and that’s when my issue started but not sure if it’s the reason it started but it’s the only reason I can come up with and we’ve tried every thing to fix it but nothing is fixing it not even a chat with the xfinity expert was able to fix it but I’m regretting my switch because didn’t realize how much I depended on Verizon for all things I use for my phone including my Verizon cloud and bunch of my subscriptions and voicemails and security features , which by the way my passwords have already been released with my shared data through xfinity and only took 2days after switching my secure data was shared so not happy about that , I never had to worry about any viruses or hackers or  secured data being shared  like my passwords to my banking apps but now I switched over and lost all my protection I was very confident in , I have to watch and figure out ways to set up better security features and figure out all the features I had and everything I relied on with Verizon and go through xfinity apps and features to find similar options but all things I had on my clouds are gone 

I am having this exact issue and have been on the phone for two days in a row and nobody can seem to fix what is going on. What am I suppose to do when I can't even call out

I took the phone to the xfinity store. Nice tech people. The wait time for getting helped was expected and acceptable. Tech called the hotline and after the tech performed all the suggestions that the hotline suggested, one hour later they hand my phone back to me. They performed some kind of partial factory reset. I lost some minor things like my screensaver picture, wallet credit cards, Apple Pay account info. I had to reinstall my facial recognition info and Re credential my credit cards and banking passwords. I now can make outgoing calls. I watched Avengers on the big screen while the tech worked with the hotline. Much less frustration than dealing with faceless accents that I have terrible difficulty understanding with my hearing aids on high. Face time at the store was less stressful and successful.

I moved my service from Verizon to Xfinity two weeks ago and now I cannot make an outbound call. I get the same message.

We're sorry, the number you have dialed has calling restrictions that has prevented the completion of your call, announcement 19

I have been on the phone for 3 hours trying to resolve.  I was given ticket number and told it may take up to 48 hours to resolve.  Going back to Verizon and port the number back.

Switched from Verizon to Xfinity Mobile yesterday, just discovered that my wife's phone can't make outgoing calls. Been on the phone with Xfinity for about an hour so far. She is telling me she is on the phone with Verizon and that this problem started on 4/7/2022. Sound to me like it's been going on for a lot longer than that. 

having the same exact problem - been on the phone with support for an hour. Anyone figure out a fix to this?