How you turn your blackberry into a modem?

Yes, you can make your Android phone as a modem, or more appropriately, a wi-fi hotspot. It is in Settings>Wireless & Networks>More>Tethering & Portable Hotspot. Once in there, setup the wi-fi hotspot, turn it on, and you can connect your laptop, tablet, or any device that requires a connection. Please note that data rates from your carrier may apply, and in some cases, this feature might even be blocked from being used until you pre-pay using this feature.