First some background. We have flow monitors installed in sewer manholes. They monitor sewage flow. They collect the data and send it wirelessly to a server so we can check the data without having to physically go to the manholes. The modems are integrated into the meters. They are 3G modems and 3G is not going to work for much longer. Is there a device/method that can pick up the signal from a 3G modem and translate it to a 4G network?