I have an unlocked 750 using on T-Mobile network and receive an error message 504 when I try to access the internet.

Have spoke with T-Mobile and have upgraded my internet plan. Same problem.

Have been told by T-Mobile to download OperaMini, I have downloaded it to my computer but cannot seem to get it to sync to the device. I really don't know how I suppose.

Do I need to upgrade software?

How do I sync software from my computer to the phone?

Am I going to need to go to a BB?

Thanks in advance