What kind of username is acceptable?

I have tried 9 different usernames. It keeps coming back with...only letters,numbers,underscore acceptable.. well I was using letters and numbers.

Originally Posted by CrackBerry Question

I have tried 9 different usernames. It keeps coming back with...only letters,numbers,underscore acceptable.. well I was using letters and numbers.

Is it saying your desired username is available to begin with?

Yu added space?

BlackBerry Z30 fan nd a Proud Passport SE user