To have the use of a cellphone while visiting San Antonio, the easiest thing to do is buy a cheap prepaid cellphone. These are for sale in various outlets, but the cheapest and easiest way to get a phone is probably through the local H-E-B grocery stores. This chain has entered into business with a local company called Pocket Wireless (www.pocket.com), which has other independent outlets. Go to the website for locations, or go to www.heb.com to use a store locator.
Internet & Wi-Fi
If you have your own computer, access points for the Internet abound in San Antonio. Most likely you'll be able to use the hotel or bed-and-breakfast where you'll be staying. If you are seeking to avoid a charge for the service, you can go to a public library. The downtown branch (tel. 210/207-2500) is at 600 Soledad St., at the corner of Navarro, in the northern section of downtown. It offers laptops for use in the library, which make use of the free Wi-Fi. Most coffee shops in downtown San Antonio offer free Internet access.