I am happy to report that the charger / amplifier telescopic antenna has improved the RSSI of my G5 to an acceptable level, from ~ -110 to about -90 on average (as measured by the radio). Today might be a good day for me as weather seems to affect my signal strength here in the coastal woodlands, but I am pleased with its performance and I'm sure it will be even better when attached to the outside antenna system. For a datapoint, my FirstNet 4G cellular service is marginal here in the trees even when outdoors, thus I enable the Wifi Calling option for reliability indoors. Large / tall pine trees do affect radio signalling in our area.