Many vendors sell smartphones, and they can easily be found on the Web. Try Amazon, eBay, and Dell - all of these have smartphones - or try the Websites of the brands you like, such as Nokia, BlackBerry, etc.

There are very few online retailers that sell used Blackberry smartphones with a minimum twelve month warranty. The only places with a 12 month warranty are Mobile Karma and Square Trade.

Walmart is a supplier of Blackberry Smartphones. They sell a BlackBerry Storm2 9550 by Verizon, as well as a BlackBerry Torch Smartphone from AT&T. Also a BlackBerry Smartphone in black with a model number of 8820 is sold by Walmart stores.

There are various shops that sell Palm Treo 750 smartphones. One can purchase this product from Amazon or from some stores that sell phones and phone accessories.

Walmart does indeed sell smartphones. The benefit of going to Walmart is that multiple cell phone providers are available at one place, such as Verizon and Sprint.