The speed of your Smart Phone mainly depends upon the configuration of your mobile but by doing certain things you can speed up your internet access :
>> You can download some apps from android market to speed up your internet like Speed ​​Up Internet or Internet Booster.
>> By clearing your browser cache can increase speedup your phone.
>> You can use Opera Mni if you are happy browsing only because it is a light browser than others.
>> Keep on updating your Smart Phone firmware because it can automatically fix some lag, bug, and other issues that you may not be aware of.