When downloading mobile phone apps online, some are in the _ jar or .ext format. Which u're required to change to .jar using files explorers etc as they case may be to be able to use the apps. But please hw do .zip files work? How do i make them functional? Thanks

zip files are compressed files, just uncompres it

they are files compressed to make downloading easy for you. to unzip it, use Winrar application or 7-Zip.

i think i put this in the wrong place i'm talking about mobile fones a friend told me i could use blueftp. Is it the extract option m gna use?

Thanks i found winrar