A. Yes, there are a few tricks that can help you cut your wireless data bill.
a. Opera Mini
It's a mobile browser that shrinks the amount of data you need to open web pages by up to 90%! It's compatible with most smartphones and is very easy to use.
b. Opera Max
This app is available in beta testing right now for Android devices, it compresses pictures and videos that you view on your device so they require less data, although the image quality might suffer.
c. Onavo Extend
This app compresses data while you are online to lower your consumption, but it doesn't squeeze streaming video. It is available for Android, iPad and iPhone.
d. Onavo Count
This app lets you monitor your data usage as well as the amount of data each app is using.
Of course, the best way is to get on WiFi wherever available.