How To Install Apps In Galaxy Fit?

I have recently bought a samsung galaxy 3 and I'm unable to install apps via downloaded software on my pc. I used the kies pc suite for samsung and the error I get is the file is not recognized. The file extensions are .apk which should ideally work...

I bought a samsung galaxy y recently.......but I have a few questions...... 1. Can I install apps and live wallpapers on my phone using the Kies Software ??? 2. While accessing Internet and downloading things is there some king of Anti virus available...

I would like to install as many apps and games as possible to my Samsung Galaxy S 5.0 to get the most out of it. Which ones are the ones that are the most useful, fun and worth to have. Free ones preferably.

I have tried the apps2sd app but none of my downloaded paid apps show I have tried Apk Installer and it gives the option Cancel or Install I pressed install and it doesn't do anything? Please help me fix this

When i try to install only a message appears i.e "couldnt install on usb storage or memory card"

My phone dosen;t have internet access at all! It has wifi but in my home there is no wifi...so how to install games from android market :'(((

plzzz tell me cann i do this as i planning to nuy this phone so can i install n use themes on the phone as used on sony ericson n nokia phones ..

I wanna buy a phone,but i don't know which is better between galaxy note and galaxy s3 Price and size of screen is not important,but i heard when install for example 200 apps or games on galaxy note,the speed of phone doesn't decrease! I wanna know is...