Post
The Swiss post is generally reliable, and also can take care of all your financial transactions. There are post offices all over the city - the university post office just next to the train station has long opening hours (see below).

Dialling
Switzerland’s calling code is +41. Lucerne’s code is (an additional!) (0)41. We list the country code before all telephone numbers. Of course you only have to use this if you are dialling from abroad. If you are already in Switzerland, just ignore the +41 country prefix, dial 0 and then the nine-digit number.