B014VB0NNC Smoothtalker Z1 60dB 3G High Power Cell Phone Signal Booster for Home & Office

Recommended for locations within 10 miles from the nearest tower
Improves voice calls and increases data speed for all cellular devices
Supports all networks except Sprint bands 26 (800MHz) and band 41 (2500 MHz)
Boosts all 4G LTE and 3G signals for all major networks
Made in North America – 1 Year Warranty – please scroll down for more product info.