We have now started using 4G controllers instead of old 3G controllers.
When replacing 3G controller with 4G controller you need to install also new antenna. The old antenna does not support 4G.
You do not have to remove the old antenna from the charger but only install the new antenna.
New antenna can be installed on the other side of the EVF (Pro) or EVC (Premium) or with EVB (Wallbox) you can install the antenna on the cover of the charger.