I'd actually suggest getting a separate 3G modem for the computer, rather than trying to get the phone
to do both. Pre-paid data plans or voice plans are usually pretty simple, but getting both on the same phone usually requires a contract
. An unlocked USB 3.5G modem only costs ~$60 here in Malaysia
. We also bought a $70 WiFi
router that takes a 3G modem as the uplink, so all computers
on board can share the connection.
You'll need to buy it a new SIM in each new country, but you'll probably be doing that for the phone as well. SIMs are cheap
cheaper than roaming charges. Your number will change when you change your SIM but we've found that folks from home never
call us - they use Skype or email
(although you could send a newsletter with your new number, if you wanted). We also bought a Skype phone number which takes voice-mail if we're not online, & gives us free (Skype) phone calls to the US & Canada
BTW, beware of buying
US phones. The US, in it's infinite wisdom, uses slightly different frequencies for its variant of GSM (what the entire rest of the world uses). So you need a 3- or 4-band (frequency) phone to work both in & out of the US. We just go with a cheap
Nokia, bought overseas.
We have a bit more on our 3G Modems