I moved to Switzerland with my wife around a year ago. Some months later, I hired a Sunrise plan with an iPhone 4S together with a USD 45 subscription for my wife. Later on, I got another one for me. I also encouraged friends and family here to get a plan too, so we could all talk for free (on the same network). As result, my sister in law and my brother in law also got a mobile plan with Sunrise.
A month ago, I started working in a project for a company in Kaiseraugst, Switzerland near the border with Germany. Yesterday I received the bill from the past month and Sunrise decided to charge me roaming costs, even without leaving the country.
The problem is that Sunrise has a very bad coverage on different parts of Switzerland, one of those is Kaiseraugst, and my iPhone 4S if set to automatic network usage is changing all the time to a network in Germany because the signal strength in this Swiss city is not good. So this month only I received 50 (yes, 50, I counted them) messages by Sunrise saying me that my phone was in “Roaming mode”. I also tried setting the iPhone 4S to use only the Sunrise network but I also receive several messages saying “Your Selected Cellular network is not longer available. You can choose a different network in Settings”. You can imagine how annoying these messages can be.