I roamed on TIM and Vodaphone in Milano. Vodaphone proved to be a better
choice for me for data,

It could be one of three listed here, at $1.29/minute:
http://www.cingular.com/customer_service/roaming_gen

     WIND 900/1800/3G MHz 39 $1.29 Yes  1
     TIM 900/1800 MHz 39 $1.29 Yes  2
     Vodafone 900/1800 MHz 39 $1.29 Yes

Coverage Notes: 1. 900 nationwide coverage; 1800 in major cities &
highways.
2. 900 nationwide coverage; 1800 in major cities & highways.

Now, which Blackberry could he have? The 6210 has 900 Mhz, and the
models 6280 and 7280 have 1800 MHz. See
http://www.cingular.com/customer_service/roaming_device.

John C.