May 2005 I was not into mobile devices at all. It took a long time to get me convinced using a mobile phone at all. I think I got (or more precise, was forced to ) my first mobile phone (a 2nd hand Siemens S66) in 2004.

Back then I was developing gDesklets for GNOME (http://gnomedesktop.org/node/1265). That's why I was at GUADEC 2005 in Stuttgart, where Nokia was showing the Nokia 770 to us.
It was an amazing device and we were all drooling over it. Later that year I registered for the 770 device program and got accepted to receive my 770 for 100 EUR in October 2005.

Summer 2005 was a also a special time for me as I graduated from university, co-authored a book (http://www.amazon.de/Exploring-Pytho.../dp/3935042698), and started a company.