what is the difference between treo 650 and other mobile phone devices such as nokia or blackberry?

In short, The Treo is a true PDA using the Palm Operating system that has a phone attached. It is a true handheld computer that you can program if you so choose. (But few people do).Or you can go to any store that sells software and usually find INEXPENSIVE extra software titles from games to accounting and database applications.

The Blackberry, the Nokias, the Motorola Q's are considered 'Smart Phones'. They are telephones with Organizer features built in. They often use the PDA like physical design which can cause confusion. Their operating systems are limited and unique to each phone manufacturer. Additonal programs are expensive, limited in nature, and usually available only from the phone manufacturer.

The Motorola Q is a kind of hybrid device, it uses a special truncated version of the Windows Mobile Operating system, SOME programs for standard Windows Mobile OS based devices will work with the Q, but it is extremely limited in that area.

I have a friend who sells phones for a major carrier and she says they get a LOT of Q's returned. People think they are buying a true PDA and are disappointed when it won't do what they want. for about $100 - $150 more you can buy a Treo. It is worth it in my opinion. BUT if you can get by with the built in applications, and are pretty sure you won't out grow those programs, the Smart phones are a good buy. The PalmOne Treo 650 is designed to work on the 850/900/1800/1900 MHZ GSM/GPRS/EDGE networks: