Hi, you have reached (names) voicemail. If you want money or to sell us something, we a) gave at the office, b) already have it, or c) don’t want it. If you are a friend, trying to give us money or just want to talk, then leave a message or try my cell phone number.
Some networks charge a flat monthly fee to use voicemail, while others charge for each individual voicemail message, or charge by the minute while you're connected to the voicemail system. Some networks even charge you for simply recording a voicemail message - even if you never bother listening to the message.

After setting the number on your voicemail, you must also record a personal voicemail greeting. Follow the steps below. Start the Phone app. if you don’t see the numeric keypad, tap “Keypad” at the bottom of the screen. Tap and hold the “1” for about two seconds until the phone automatically calls voicemail. Immediately tap “3” to access voicemail settings. Listen to the options. On most voicemail systems, tap “2” to start the process to record a new greeting. The current personal greeting will play; then tap “2” again to record a new greeting. Say the greeting you want, and tap “#” when you’re done. To save the greeting, tap “1.” The personal voicemail greeting has been set. Hangup the phone. How to setup voicemail using a Visual Voicemail Applications
The reason these hacks work is that it is possible to access your voicemail from another phone by calling the voicemail number for your network and then entering your unique voicemail PIN. For example, If you are with EE you can dial 07953 222222 from any phone and just enter your voicemail PIN to listen to your messages.