I had my Gravity smart for about 10 days, only installed a few apps to mainly try and preserve the battery life, and a couple of others and I was already getting the "out of memory" warning. It showed I had about 11 megs of memory left, and of course there is no way to uninstall the apps that came with the phone, which I don't use, so I decided that I had enough. I took it back to T-mobile and upgraded to a Samsung Exhibit ll. What a difference, tons of memory, plus you can install a memory chip for additional memory. It was about $100 more than the Gravity, and has alot more features and speed as well as 4G.