Phonetone 5G LTE Cell Phone Signal Booster

5G 4G LTE Cell Phone Signal Booster 700/850/1700/1900MHz Band 12/13/17/2/5/4/66 ️ 【Product Features & Smart Device】The Phonetone cell booster comes with a smart key feature of AGC (Automatic Gain Control). In addition to intelligently detecting the existing signal strength and ...5G 4G LTE Cell Phone Signal Booster 700/850/1700/1900MHz Band 12/13/17/2/5/4/66 ️ 【Product Features & Smart Device】The Phonetone cell booster comes with a smart key feature of AGC (Automatic Gain Control). In addition to intelligently detecting the existing signal strength and automatically adjusting itself for best performance, it prevents in fewer dropped calls, improved battery life, higher audio quality, and faster data and streaming.