Want to know how many minutes you have used this month? Turns out the mobile phone companies have some not-so-well-advertised numbers you can dial to find out exactly how many minutes you've used. They are:

• 646# for Verizon and T-Mobile

• *646# for at&t/Cingular

• 4 for Sprint

Another tidbit of info to help watch the bottom line... Using directory assistance (411) service through the carrier can be quite expensive. So, consider using the Free411 service at 1-800-FREE411 (or 1-800-373-3411 for us numerically-challenged Blackberry types). The cost of using it is actually free, unless you consider the time it takes to listen to a short advertisement on each call. Heck, to save a buck a call, it's worth it I think.

Google Mobile allows you to send a text message to 46645 (google on the keypad) and get back all sorts of information. Check the Google Mobile page to learn about all the cool things you can do there.

For business directory information, you can also call Google up at 800-GOOG-411 (800-466-4411)

Source: discovery.com/geek