How to choose mobile phone signal amplifier
1.Make sure the frequency band of your carrier is suitable for this item.Otherwise the device can’t work for you. If you do not so clear the frequency of your phone, you could click this link for check the frequency band of your carriers.Below are some countries’ frequency bands for your reference
2.Make sure you can receive good signal that you want to amplify on your house outside,which must be can getting 3~5 bar signal (-70dB~-90dB signal strength) on your mobile phone. Please note that the signal booster can only boost the mobile phone network signal, but does not help to generate any signal. For example, if your outside signal has 0 bar, it can not work or bring you any signal.. Below is the method to check the mobile phone signal strength.
2G 3G 4G Network Booster
 Coverage: 1000 Square Feet without barriers
 Improve Gsm 900 LTE 1800 and Wcdma 2100 at the same time
 Support more than 20 cell phones to use at the same time
 Support different operators which have GSM 900 1800 or WCDMA 2100 frequency, band
 Easy to install. This repeater set includes everything you need.
 LED signal light indicates the signal status.
 One year warranty
1. Gain: 70db
2. Power output: 23dBm
3. GSM 900MHz: uplink 890-915mhz;
DCS 1800MHz: uplink 1710-1785mhz;
WCDMA 2100MHz: uplink 1920-1980mhz;
downlink 2110-2170 mhz
4. Impedance: 50ohm