Every mobile phone offers a different combination of features.  Explore the menus on your mobile phone – more likely than not, it will offer some useful functions that you haven’t yet discovered, and which you can start using straight away.

Voice recorder: Many phones have this feature, but you might be surprised at just how useful it can be. Let's say your short term memory is down to a few seconds. With your voice recorder, also called an audio recorder on some handsets, you can record short notes to yourself and play them back later. It can be a great way to remember an address or a few random facts, or to record the short details of an important meeting. 

Google search: If you're on a business trip in an unfamiliar city and need a fast copying service, your mobile phone can be a much better tool than the local phone book. Google offers a free service that delivers a variety of information through SMS. Sending an SMS will give you the address and phone number, which you can then call for information or reservations.

Voice messaging: There may be times where you want to send a colleague a message that's too long to send by text. Or maybe it's late at night and you don't want to disturb them with a phone call. Some phones allow you to send voice mails directly to another phone's voice mail without actually placing a phone call.

Bluetooth file transfers: Everyone knows about Bluetooth headsets, but Bluetooth has a long list of other uses. Previously some manufacturers and carriers restricted how Bluetooth was used on their phones, but most of those limitations no longer exist. Using Bluetooth, you can transfer photos and other files off your camera phone to another Bluetooth device. The process is exceedingly easy, and it's free since you won't have to use your carrier's messaging service.