Until 1993, Swisscom and Swiss Post were part of the PTT, a state-owned post and telecommunications company.
This Martin Altenburger & Adrian Frutiger-designed logo incorporated the Swiss cross.
This logo (using the typeface Frutiger) was introduced when the PTT was split into two separate companies: Telecom PTT (soon to become Swisscom) and Swiss Post. This design was only to be an intermediary solution until its rebrand to Swisscom.
In 1997, Telecom PTT was rebranded to Swisscom, and was given a new logo. The company colours were changed from yellow & red to blue & red to achieve a greater distinction between the postal service and the new Swisscom.
A new logo and identity was created in late 2007 by Moving Brands and introduced in 2008.