Here is your info. And for another 10 points I will do your presentation for you too. lol
Radio Shack has good scanners. Uniden also makes their Bearcat scanners....which are some of the best out there...
It depends upon the model. For example: The Uniden Bearcat 200/205XLT can be modified for Cellular scanning by cutting or removing the 10K-ohm resisitor located on the printed circuit above the letters "DEN" on the microprocessor chip labeled "UNIDEN...