Other contributors have said "How do you change the text size?" is the same question as "How do you change the text size on blackberry cell phone?" If you believe that these are not asking the same thing and should be answered differently, click here
How do you change the text size on blackberry cell phone?
Go to the settings and tool menu. This will be a display setting and it should be listed as font size or font settings. Only some of the text can be changed, some of it is standard and will not change.
if you have the phone then you have to have to call your company and see wat they say... and if ur getting a new phone then [even if not the same company] than you have to tell them b4 activiting ur...