Need help enabling data on my Galaxy S2 phone settings
 

This might be a noob question, but I don't know much about phones.

I have the Galaxy S2 X (Telus)
For some reason, I can't do anything online using data anymore.
I'm usually at Wi-Fi areas, so I don't know exactly when this started happening.
Last time I used data was probably a few days ago.
Usually I have that "4G" icon in my taskbar when data is enabled.
But I can't get it to show up anymore.

My Wi-Fi works perfectly fine.

I assume I must have changed the settings somehow, but I can't figure out what settings.

-Flight mode is off
-Use packet data is checked

-I tried rebooting my phone

Not sure what else I could try...

Did you add Telus APN to the internet setting?

Okay, I went into the APN settings and kept playing around with it, and eventually got it to work when I just reset the thing.
Apparently some widget I installed changed it without me knowing. Just learnt something new.

Thanks