Where can I buy a quad band mobile phone?

Amazon has 2 Motorola Motofone F3 Unlocked Phones with Quad-Band GSM 850/1900--International Version with NoWarranty (Black)    and 5  Samsung i900 Omnia Unlocked Phone with 8 GB Memory, 5 MP Camera, GPS, Wi-Fi, Windows Mobile 6.1, and MicroSD Slot--International Version with No Warranty (Black).  This phone does not come with a warranty. These unlocked devices are sourced from many countries around the world. Most come with a manual in English. If there is no manual in English for a given phone, the manual will be provided on the phones product page at http://www.Amazon.com. As always, you are covered by Amazon's 30-day return policy.
The Palm Centro is being sold at Dell for a great price.  Here is more information I found on their site.  The Centro™ Smartphone from Palm® gives you the convenience of having a phone along with email, messaging and web access capabilities. It lets you store your contacts, check the calendar, view photos and listen to songs. Additionally, everything featured in the smartphone is very easy to learn so that you actually use all the features making it ideal for your day-to-day use. The Centro™ White is equipped with a large color touch screen and an easy-type keyboard for convenience. The Bluetooth® connectivity let you easily and quickly transfer and share your data.The size of this smartphone gives you the freedom to take it anywhere and still be connected to friends, work and family. Moreover, it includes an 'off' button, for times when you do not want to be connected at all!