Has anyone solved the managed device error. Something went wrong

I’ve been with Xfinity Mobile since almost the beginning. The device I have the problem with is an iPhone 15 Pro.  I added it  to a line that previously had a 13 mini and before that an SE second generation. I’ve talked to three or four agents about this and actually went to the Xfinity store. Everything seems to be correct and yes, I am using the Xfinity app. I think the issue has to do with the fact that in the past, if you change the device, the original purchased item still showed for billing, but the new device with the new IMEI would show when you clicked on it.  My 15 Pro shows on the line, but no ties to the previous items.  I’ve been very frustrated with this. I think it’s just a matter of an agent coding the system properly, but I haven’t been able to find anyone that can make this happen. The phone itself is working well. I’ve been thinking about updating through Xfinity Mobile, but I’ll probably have to try something else if I can’t get this resolved in the next three or four weeks

App is the latest and I get the same air using the website and going in through my iPad or my iMac. The phone I brought over is of course fully paid off.

if you would like some more details, let me know, and I can respond to you directly

@wpaulo I appreciate all the additional information, and I'd definitely like to investigate further and help get this resolved. I've replaced my iPhone a few times since 2018, and still can access the Xfinity App to manage and view device info. So want to find out what is happening with yours. 

Since I will need to gather some information to locate your account that we don't want in our public conversation. When you have time, please send a direct message. 

To send a direct message: 

Click "Sign In" if necessary

• Click the "Direct Message" icon in the upper right - it looks like a chat bubble  

• Click the "New message" (pencil and paper) icon just to the right of Conversations

• Type "Xfinity Support" in the "To:" line - do not use the Employee's name!

• Type your message in the text area near the bottom of the window

• Press Enter to send it

To expedite your request, we ask that you please include your name, the account holder name (if different), and the service address

@wpaulo I appreciate you sending the direct message with the requested information, I'll follow up with you there to troubleshoot the Xfinity App concern further. 

Same issue I am facing with my nuber assoicated Iphone 16 pro Max

Hi there @SuperGotenks, we understand that you're hitting a wall with that "something went wrong" error and are unable to change the line name or control number lock. Let's see how we can get this sorted for you. Make sure you're using the latest version of the Xfinity app, as updates can often fix bugs.

You can also try accessing your Xfinity Mobile account through the Xfinity website (xfinity.com/mobile) to see if you can manage the line name and number lock there.

@wpaulo Please reach back out through the direct message with your full name and the service address, and we can check back into the escalations to see what the latest update is with those. 

To send a "Direct Message" to Xfinity Support: 
Click "Sign In" if necessary 
Click the "Direct Messaging" icon or  https://forums.xfinity.com/direct-messaging 
Click the "New message" (pencil and paper) icon 
The "To:" line prompts you to "Type the name of a person". Instead, type "Xfinity Support" there 
- As you are typing a drop-down list appears. Select "Xfinity Support" from that list 
- An "Xfinity Support" graphic replaces the "To:" line 
Type your message in the text area near the bottom of the window 
Press Enter to send it.