Help What are these icons?

[Smokey Joe]

Ok in my app drawer I have to pre-installed apps that one I dont know what it is and the other I don't know what it does or how it wurks...

The first one is called "SIM toolkit" and when I press it all it tells me is that "SIM toolkit is not ready."
The other one is called "Task Manager". When I go into it it tells me memory used and free as well as(best I can tell), open apps. It gives me an option to "Refresh" or to "Kill all". When I hit Kill all it makes the phone act all crazy... untill I go into my ATK and hit the kill apps button in there and then it goes back to acting normal.

 

[nynvolt]

Get rid of the atk app, that's what task manager does. I don't want to say what the Sim tout is because I'm not 100% sure. I'll be watching the thread to see what others have to say.

 

[thornev]

I use Task Manager frequently to kill individual apps such as the browser and other apps that don't kill their own processes when I'm done with them. Some will argue this is not true, but I find my phone stays running snappier when I have more memory free. I also use Fast Reboot occasionally to clean out all unused memory, but then some apps take a little longer to restart.

 

[draconius]

I use Task Manager frequently to kill individual apps such as the browser and other apps that don't kill their own processes when I'm done with them. Some will argue this is not true, but I find my phone stays running snappier when I have more memory free. I also use Fast Reboot occasionally to clean out all unused memory, but then some apps take a little longer to restart.

Or you could save yourself an app, pull down your notification, click on quick settings, then total memory. HTC provides a task killer right there.