Welcome to the community!
I would love to help and see what happened on your mobile service. I was able to locate your account details using your community details.
What troubleshooting have you done so far?
Are you using an iPhone or Android? If you're using an iPhone it is best to switch the DATA option to 'DATA only' not 'Voice and DATA'
Please post the screen shot of the Signal Data Error on this thread for additional reference.
Let me know how it will go, if the issue still persists I may need to arrange a call from one of our Mobile Specialists for further test and investigation.
Kindly PM me your best contact number and preferred time.
In case you need a reference: How to send Private Message.