phone without encryption

hi, some stupid question: if a phone does not support any encryption, is it possible to use it on an official GSM network? (authentication works, of course) if so, what phone might it be? regards andreas Mit freundlichen Grüßen, .-. /'v'\ (/ \) ------------------------------------------------------------------"-"- |_| i.A. Andreas Eversberg Network Operations / 2nd Level Data - KC Internet Versatel Nord GmbH Nordstr. 2 D-24937 Flensburg Fon: +49-461-9099749 | Fax: +49-461-909960749 andreas.eversberg@versatel.de@versatel.de | www.versatel.de Sitz der Gesellschaft: Flensburg, Registergericht: Flensburg, HRB 3395 FL Geschäftsführer: Dr. Hai Cheng, Dr. Max Padberg, Joachim Bellinghoven