[littlemrsj]

Hi i keep getting this little black clock in the middle of my screen it stops everything working i can,t receive call msgs nothing what can i do please help i have a 9300

[devnull]

The clock symbol is a "busy" indicator. It's telling you that the phone is busy processing something. You probably have some background application running.

1st step to take if device is having problems? - BlackBerryFAQ

[Dubdub]

Or you do not have much available free memory.

[tsac]

too many apps using memory is one cause