With Messagenet, you can

Get a free UK or Italian phone number.
Sending and receiving faxes.
Making and receiving calls.
Sending and receiving sms.
Call any phone worldwide. The first 20 minutes are free.

How to get a free DID and How to use?

Sign up here

http://www.messagenet.it/voip/free/nuovo/

And then fill in your information. Be sure to enter the email address and phone number correct. And you will receive a verification code with your mobile.
After your account is confirmed, you will receive your account information
Here is the information you need to use the service:
URI (SIP client identifier): 5555555
Password: zYtRzGxx
SIP SERVER: sip.messagenet.it:5061
Configure the above mentioned information in your SIP client like Eyebeam or Yate.
Receive calls to the number you chosen.
You can get a new fax number with the area code of your choice Free. Sign up here

http://www.messagenet.it/fax/freefax/nuovo/