But, recently my mobiquus got hang when I tried to open my emails. My phone screen was black. And after 15-30 minutes, appeared a notification that said my phone space was full. And it's true. Then, I deleted some of my files in my phone. But, after that, my mobiquus still the same. It hanged everytime I opened my emails. And I still couldn't read my emails.
I've tried to reset the application from Menu -> Advanced -> Reset application. Then my phone hanged even worse and my phone looked like dead. So, I have to take off the battery and turn it on again.
So, the one solution that I found, I deleted the application, and installing it again. And the problem's gone.
Btw, I'm using Sony Ericsson C903.