First of all

Make sure you are using the signal you want to amplify.

(for example, if you wannna amplify 3G, your phone needs to use 3G now )

And go outside where could receive good signal.

Secondly

For iPhone

Please dail *3001#12345#*

then click "serving cell info"

and check "Freq Band Indicator"

For SamSung

Please dial #*0011#

Then click "SIM INFORMATION"

And check "BAND"

For other android cellphone

Please install an APP named: network cell info lite.

Finally

Find the corresponding frequency according to the following information

OR send the screenshot to us directly.

Band 28=700Mhz

Band 40= TDD 2300Mhz

Band 13= 700Mhz

Thanks for reading!

900 1800 2100 2600mhz Four band Mobile Amplifier repeater GSM 4G repeater 2G 3G 4G repeater LTE DCS cellular Signal Booster 2600 GSM 900mhz Frequency Range: Uplink:890-915mhz Downlink:935-960mhz DCS 1800mhz Frequency Range : Uplink:1710-1785mhz Downlink:1805-1880mhz WCDMA 2100mhz Frequency Range: Uplink:1920-1980mhz Downlink:2110-2170mhz LTE 2600mhz Frequency Range : Uplink: 2500-2570MHz Downlink: 2620-2690 MHz How to work: 1.Outdoor antenna (Yagi antenna) receive the signal from base station. 2.Then, sends the signal to repeater through long cable 3.The repeater receives the signal and improves it. 4.After that, signal into the indoor antenna(panel/ceiling/whip antenna),finally your mobile phone signal will improve.

INSTALLATION

1.Fix up outdoor antenna on the housetop and point to signal tower. 2.Connect outdoor antenna to "BTS" of the signal booster via cable, The signal booster is more than 1 meter away from the outndoor antenna. 3.Connect indoor antenna to "Mobile" of the signal booster via cable, The signal booster is more than 1 meter away from the indoor antenna. 4.Plug the power adaptor,power light will be lighting. 5.when the outdoor antenna receive the strong signal the LCD will be display the signal.

Easy install 4 steps:

[ 1 ] Mount the External Antenna where you have the strongest cell phone signal, typically on a roof or in an attic.

[ 2 ] Connect the internal antenna to the Amplifier Base Unit and place where you need improved signal. Indoor antenna should connect "MS" end of Amplifier.

There should be a minimum of 2 vertical meters of separation between the Base Unit and External Antenna.