Is the Blackberry 9700 an 8GB phone? in Zambia there are no Blackberry 8GB phones.
Unfortunately the Blackberry website doesn't have a specific website for Zambia. Some manufacturers are restrcited by some countries to sell devices with certain characteristcs, most of the time the goverments control the frecuencies under which the devices are allowed to opperate.
If we look at: http://www.gsmarena.com/blackberry_bold_9700-2963.php You can see that they are listing it as a phone that has 256 MB of internal storage and comes with a 2 GB microSD flash card (external storage) and the biggest microSD card it can handle is 16 GB.
Is your cell phone company/carrier selling that model with an 8 GB card? What is the name of the carrier? Does it have a website?
Hope it helps!