what does the beam icon do
 

i have been reading on how to make the battery last longer..they said to turn of the beam..do i need that for anything interenet , wi-fi etc.

and someone was saying they have Seido extended OEM battery
where do you buy those..thanks

http://www.seidioonline.com/

The beam needs to be on only for... beaming information. It's the infrared port on the device.

oh so if i dont use IR , i can just leave it off..which would free some memory...is the right..thanks for the reply pibe38

Well no...

From your other thread on the Touch forum I assume you have a Touch. The Sprint Touch does not have an IR port, the option is there because it is part of the OS as far as I know.

Also, turning off something like IR would have no effect on memory, only on battery life.