How are you supposed to install apps like jad files on the device? Can it only be done by downloading from the net to the phone?
The problem with this is that it costs money to download to the device. I don't have any data allowance so this is a stupid restriction not to allow jad files to be installed once dumped on the phone from a PC. Almost as stupid as not having a file explorer type option!
.jad files are meant to be installed from the phone browser. It is
not a "stupid restriction", it is just the way it is. Also if you open
the Media Player, press menu and then explore, there is your file
explorer.
Either get a data plan or learn to live with the encumbrances of
not having one, but don't blame the device.