Hello there, I recently bought BQ Aquaris U Plus (Android Nougat) and I notice that whenever the phone is close to another speaker device, like a radio, it sends static / interference signals even when there's no activity going on with the SIM cards (normally it happens when you're making a call, receiving/sending a SMS). This noise happens every 120 seconds or so. My friend has the exact same model and her phone doesn't behave like this. Why is it constantly communicating with the cell towers? Thanks.