I am using the $5.99 plan with my Samsung T-509. I am able to download Google Street and Google Satellite maps. BTW, I was previously getting pretty good dl speed using only the basic voice plan but I guess T-Mobile shut down the ports as it stopped working. That's why I got the $5.99 plan. I was getting around 150-170 speed on the voice plan. Now, with $5.99 plan, I only get around 100 speed. Same exact settings used on my 770 with both plans. Don't understand why the $5.99 plan is slower.
Neil