For Fun: Your Nokia as Walkie-Talkie       
Using the T2ME application who adobe a Push-o-Talk system into a Virtual Walkie-Talkie, you can sending a voice messages (through the GPRS) for 15 seconds. By press the button, put your message and it will automaticly sending your voice messages to the location number. Here are the steps:

1. Visit: www.t2me.net/tos See the term of service T2ME.net. On the bar menu, klik ikon 'Get It'. Next page clik 'For Cellphone'

2. Fill your name, email address, country, phone mobile number and bla bla bla (like you all usually do)

3. Download T2ME and move it to your phone by bluetooth, cable data, infrared etc etc and install it. Try to save it into your memory card if you don't want to finished your phone internal memory  

4. Run the program, and fill the ID and the PIN that you got from your email address sent by T2ME (you may want to check it in the bulk mail). Finally you connecting and logging on T2ME (make sure your GPRS is already active), now you can sending your voice message to the other phone who must also had the T2ME installed in their phone.

5. Choose 'Option' then 'New Message'. And put your number location, for example '0812198xxx or 016981xxxx, put your country code number in front of it, like '62812198xxxx or 6016381xxxx'. Or you can doing it from your Contact Phonebook. Choose 'Contact' then 'T2Me contact' and choose the phone number location.

6. There will be Numbers/a box of name will appeared in your black T2ME screen, you can sending the voice message by pressing and hold the the talk button, then talk (maximum time 15 seconds). Released the talk button when you finished and send it (just like you sending SMS)  

T2ME also can send voice messages to an email address. By choosing from menu 'Option' then choose 'New tmail'. The message will be received into MP3 file format.

Used for Symbian phone Series 60 (7650, 3650, 3660, 6600, N-Gage), Sony Ericsson (P800, P900, P910), Siemens SX1, SendoX, Panasonic X700, Motorola (A1000, A920, A925), BenQ P30, etc etc

Have a nice try Bro, Good luck