few specifications of the phone are:
Tri-band GSM (900/1800/1900 MHz)
Other features include a 2.8-inch QVGA display, a mobile TV, Bucktooth, an FM radio, a VGA camera with video recording, a 1GB MicroSD card, and a pre-loaded National Geographic content (ring tones, videos, wallpapers)
This phone is not locked to a specific network therefore if you are a frequent traveler and need to travel to other countries you can use this phone in the other country as long as you get the sim card for a mobile phone service provider in the current country you are at. I think roaming applies to this principle you can see your current provider and ask about roaming coverage and charges in other countries.
The beauty of having a dual sim phone is you can have two sim cards for different service providers example you can have a sim card for AT&T and Sprint both in one phone this is excellent, you can benefit in phone plans for either providers not only that but if both have either phone providers say launches a promotion for say - free sms or free calls you can benefit.
