You might look at using something like Onovo Extend. It's available (free) on Google Play.
"Onavo Extend lets you get up to five times more out of your data plan without changing the way you use your phone. With Onavo Extend, engage in more app activities, photo sharing, web browsing and more on 3/4G without breaking your data cap. The app lets you compress your mobile data so that you can do more with your Android’s mobile data month after month. And, if you travel abroad, Onavo Extend helps you stay within your roaming plan and saves you money while helping you do more with your data plan."