the best you'll see from the network is 5-12mbps, sometimes being much slower, which is why you're apps aren't updating.
if you live in a fringe area you may consider adding wi-fi.
We are sorry to hear about your most recent application issues. Not being able to update your applications can be a hassle. With regard to your concerns about what kind of phone do you have? When did this start for you? Has your phone software been updated recently?