*Fiber optic and cable internet tend to be faster than DSL,mobile and dial-Up.
*Using a mobile internet connection in a congested room can
decrease the connectivity hence try to find a near by HotSpot
and use since its more active.
* You can try using the mobile internet Off Peak hours thereby
avoiding the traffic.
*Try updating the Mobile firmware and keep checking if there
are any updates for your phone.
*Try to purchase a booster/antenna which may capture more signals.
*Do not installs lots of softwares on mobile.
*If you are interested only in text then there is option in mobile to block images. That will give you fast speed and will have less charges as some providers charge per KB.
*Do not access other applications while surfing.
After you have tried some of this,try your connection again using http://www.scanmyspeed.com/ and see if it's running any faster.If you are not still satisfied try to upgrade the data plan.