Quam started in November 2001 and was a joint venture between Telefonica and Sonera (now TeliaSonera). They used E-Plus' network at first and were going to establish their own UMTS network. Unfortunately, their service wasn't really well-established so they ceased operations in November 2002. Most of the customers migrated to T-Mobile and E-Plus took over Quam's UMTS infrastructure.
This was their logo:
