Galaxy SIII has a weak data connection I've noticed that my Galaxy SIII has a very weak data connection at times. This occurs even when people around me with the same phone and carrier (T-Mobile) have perfectly adequate connections. 

Are there settings somewhere I'm missing? I've looked at the app mentioned in this post, but would prefer not to install another app if this can be fixed with configuration changes.
Look for the signal indicator in between  clock and battery bar. If the signal indicator is full, then voila! You should be able to get the fast data connection.