My phone was pretty much fine today until i discovered that the screen was not responding as it should.The menu button doesnt work unless i press it 5-10 times,and even when it does work it only pop ups the customization icon and still doesnt react.When i went into Setting i wasnt able to acces the "Themes" section,when i tapped on it the only thing i did was highlight the text,and then nothing.I have taken a flash under consideration.Is this a good idea?

i also had this TODAY, it became so unresponsive that i had to restart my phone was extremely annoying!

Occasional (rather rare) hicups here as well.

seem like your device got some sort of unstable applications installed or the device is stuck on some task or even inresponding (crash) that used up all of your cpu cycle and Ram. This will lead to frozen state just like an old PC. to resolve this for temporary you will need to reboot your device a few times.

try take out the battery for 10 seconds and then put i back in. if any of you installed applications from Extra-dev then uninstall it. Otherwise if it is still the same then i suggested you should do a fresh reflash the device.

good luck buds