Note: 1.Before bid please make sure your mobile frequency is 850/1900Mhz Band 2/5/25 in your area. 2.This cell phone signal booster can only make the weak signal stronger, it can't create signal, that's means it won't give you any help in an area where there is no signal at all. 3.You should get at least 2-3 bars of stable signal in the location where the outdoor antenna is fixed it outside, or the booster can't work well.△ Before purchase , Please check whether the current frequency band of the mobile phone matches the working frequency band of the mobile phone signal booster. The Testing Apps : (For iPhone)Dial *3001#12345#* → Press call button → Click 'Serving Cell Info' → Check 'Freq Band Indicator'. (For Android-Method )Download 'Network Cell Info Lite' APP → Click ’GAUGE‘ → Check Band number.Introduction This Cell phone signal booster amplifier is designed for AT&T, T-Mobile, MetroPCS, Cellular One or any other phone works on 850/1900MHz band 2/5/25, It work over the Network of GSM CDMA 2G 3G 4G . With this Signal Booster , It can Improve your Phone Data upload & download speed and reduce missed & dropped calls , You can enjoy a faster network experience . and will never miss important phone calls or business anymore .Description Brand: Subroad Operating Frequency : 850/1900mhz Frequency Band : Band 2/5/25 Frequency Range : Uplink: 1850-1910MHz ;Downlink: 1930-1990Mhz Accepted Network : GSM CDMA 3G , 4G LTE,5G Cell Service Provider : Verizon,AT&T, T-Mobile, Sprint, MetroPCS ,Cellular One, U.S. Cellular Emission Designator: GSM, CDMA(F9W),WCDMA(F9W),LTE(G7D),5G Power Supply:DC 5V from adapter Package Contents 1 x Cell Phone Booster 850/1900Mhz 1 x Outdoor Yagi Antenna 1 x Indoor Whip Antenna 1 x 50ft outdoor Coaxial Cable 1 x Power supply 1 x Installing Screws 1 x Manual