Im on T-Mobile service(unlimited plan) and since the iPhone 5 is coming in April, should I get the 5 when it comes out for T-Mobile or wait for the 5s in august(as I read)... I'll jailbreak it and install a lot of customization and especially games. I'll be playing games a lot and with my iPhone 4 it's slow and sometime shut down my games because ran out of memory. It takes about 5 minutes just to turn on my 4 to lock screen.. These are reason why I plan to upgrade.