can i save or download a picture, video, ringtone or application from a mobile website to my phone?  will i be charged?

Photos and Video:  Some devices will allow you to download and view the content types, but it is not supported by all devices.

Ringtones:  You can download tones to your device.  However, the tone may not be optimized for your device.  Most sites that offer ringtones will charge you to purchase the ringtone (credit card required).

Applications:  This is device dependant.  The only Cricket devices that can download applications from non-Cricket sites are the Nokia phones.  All other phones require the user to purchase from the Games and Apps folder on their phone (formerly Cricket Clicks).