Swisscom has announced its service plans and pricing for the iPhone 3G in Switzerland. As in many other countries, Swisscom’s pricing for the handset is tiered based on which plan the customer chooses for his/her 24-month contract. Unlike most other countries, however, airtime minutes are charged at a pre-determined hourly rate, instead of in bulk by the month. With the CHF 25 (~$25) NATEL liberty piccolo monthly plan, users get 100 MB…