Network amplifier for telephone

Telephone Network Amplifier This network amplifier for telephone is the most economical and practical solution to network problems, particularly with your operator. 
With this accessory, no more GPS outages at the top of a mountain, incessant pauses when watching a video or worse, the “No Signal” message on your phone. 
Be free to call, send messages, photos, emails, etc.,at the top of a pass or in the depths of your grandparents’ village.
 Features - Increases network performance. -Works in “sensitive” places: boats, tunnels, etc. -Adaptable to all types of smartphones.