How do I know if I'm getting 4G signal?

[TMass]

Is there a indicator on the SG2 that tells me I'm getting a $G signal??

 

[TMass]

4G signal??

 

[HeroNtheShadow]

It's the the "H" with the up and down arrows next to your signal bars... since it's technically working off of the HSPA+ network... not quite 4G...yet... but this particular phone won't pick up AT&T's 4G LTE signal whenever it comes to your city... it doesn't have a LTE antenna..

 

[Jellz]

Download a speedtest app and run it. If it goes fast, congratulations, you have HSPA+ in your area.