I have a white triangle on the top of my screen, what does this mean?

[Windows Central Question]

I have a white triangle on the top of my screen

I have it ever since I changed networks a couple days ago and I can't get rid of it. Does this mean my phone is locked on the last network?

 

[Smart_S]

The illuminati has taken control over your phone. LOL just kidding.

It's a roaming signal indicator.

EDIT: This link might help you.
http://www.windowsphone.com/en-us/h...-messaging/what-do-the-icons-on-my-phone-mean