There are at least more than 9 prepaid SIM card providers in Switzerland, with Swisscom and Sunrise being the most popular network providers. They provide fast internet speed 4G/LTE, along with a great customer service experience. Swisscom allows you to buy their SIM card prior to arrival. Yallo, Coop Mobile, and Budget Mobile are also recommended to find some great budgeted deals. Yallo offers a free SIM card with a credit of 10. – While Coop Mobile provides a unique chatting plan and one who is traveling on a budget could opt for a 4. – basic plan with Budget Mobile.