top of page


SIM, acronym for Subscriber Identity Module, is a subscriber identity card primarily used in mobile phones and mobile devices. This small card, usually SIM-sized (25 mm x 15 mm), contains encrypted information that uniquely identifies the user within a mobile network operator's network. The SIM stores data such as the user's phone number, contacts, text messages, and authentication data necessary to connect to and use the mobile network services.

In everyday life, a SIM is essential for using a mobile phone. When a user purchases a new prepaid SIM or subscribes to a plan from a mobile provider, they insert the card into the phone to activate the service. The SIM allows the user to make and receive calls, send text messages, and browse the internet using their operator's network. Additionally, the SIM can be easily transferred between different compatible devices, allowing users to retain their phone number and personal data during upgrades or replacements. When the SIM is not physical but directly installed within the device, it is referred to as an eSIM (embedded SIM).

In Switzerland, SIM cards are widely used and available to customers of the main mobile operators. SIMs can be purchased along with plans that include minutes, messages, and data tailored to the personal needs of users. Swiss operators also offer prepaid SIMs for those who prefer a pay-as-you-go model or do not want to commit to long-term contracts. 

Get a new SIM by subscribing to a mobile plan.

Read more definitions in our glossary

Do you want to discover the definitions of other terms used in the Swiss telecommunications world? Find all the terms in the glossary

1 view0 comments

Recent Posts

See All


bottom of page