Hello, I am writing to see how I can resolve this issue with my service. i have a prepaid sim card, and i seem to have spotty coverge all over Berlin. I have used this on two different phones, and I am always getting no connection, where I need to keep manually resetting/refreshing my connection to get it back. I would understand if this issue was isolated to maybe a few areas but it seems to be in most places I travel to throughout the city. Any assistance with this would be much appreciated. Thanks!