The Net 10 phones wont take apps like those not because they arent capable, but its because the software of the phone will detect that there is no payment information for the apps. I know the LG 620 (Net 10 version) will give an error message when you download anything other than whats in the Net 10 browser. The straightalk phones will let you download the apps without any problems. I dont have any experience with the sammys though.
I go to the web site mytinyphone.com and I can download a lot of games from my Net10 em326g browser by going to the wap site and putting in the id number and it downloads and install successfully on the phone. But when I install apps that require and internet connection like gmaps it runs but will not load anything from the internet. So I guess you can only do games with Net10.