New iPhone 5, but neither 3G or 4G comes up?

I got an iPhone 5 brand new on EE yesterday. I can use the Internet when I'm connected to Wi-Fi, but in the top left hand corner it just has the signal bars and EE and the Wi-Fi bar, but when I go out the Wi-Fi bar disappears but is not replaced by 3G or 4G. Is this a fault in my phone or in EE?

Did you turn the 4G/3G on? Cause if you didn't it won't show on the screen, it will just say EE.

Here's how to turn it on:

1. Go to settings
2. Go to General
3. Then go to cellular
4. There it will ask you if you want to enable 3G/4G
5. Enable it

If its not that, then maybe there's no reception or something