The Sendo X was Sendo's first Series 60 based "high-end" phone, developed after Sendo switched from the Microsoft to Symbian / Series 60 platforms.[2]
Among the unique features of the Sendo X, one was the ability for users to download new firmware from Sendo's website and upgrade the phone from their home computer.
This decision resulted in the 2004Q2 release of the Sendo X.[4]
The phone was made by Celestica in the Czech Republic,[2] however at least some model number stickers mention "Made in the Netherlands", referring to their distribution centre in Arnhem, in the Netherlands..