3G is disappearing, and what will happen to your system? For many systems, it means radio silence. For Telebutler customers? Peace and quiet. Because in Switzerland, the 3G network (UMTS) is being switched off step by step. Sunrise already flipped the switch in August 2025. Swisscom will follow suit on December 31, 2025. What's barely noticeable for mobile phone users can have significant consequences for building automation systems…