The cell phone signal amplifier (professional name: signal repeater) consists of antennas, RF duplexers, low noise amplifiers, mixers, attenuators, filters, power amplifiers, and other components or modules to form uplink and downlink amplification links. 

The basic principle of its work is: using the forward antenna (donor antenna) to receive the downlink signal of the base station into the repeater, amplify the useful signal through the low noise amplifier, suppress the noise signal in the signal, and improve the signal to noise ratio (S/N After down-converting to IF signal, filtering by filter, mid-frequency amplification, frequency up-conversion to RF, amplification by power amplifier, transmission by backward antenna (re-send antenna) to mobile station, and using backward antenna Receiving the uplink signal from the mobile station, it is processed along the opposite path by the uplink amplification link: that is, after passing through the low noise amplifier, down converter, filter, intermediate amplifier, up converter, and power amplifier, and then transmitting to the base station. In order to achieve two-way communication between the base station and the mobile station

1.850MHz signal booster can boost Jio 4g signal so that the customers can get faster mobile internet speed on Jio 4g (available in 11 of 22 circles)

2.1-year manufacturer warranty

3.Sample order is available.The sample can be sent in 1-2days after getting buyer's payment

4.Payment terms: T/T,Western Union and Paypal

FAQ:

Q: How do I know the Jio 4G frequency is 850MHz?

A: The 4g frequency can be find at settings on your phone.Or you can google it how to check the frequency of my phone.The method is very easy

Q: Can 850MHz signal repeater work in the whole of India?

A: No.850MHz signal booster works at in 11 of 22 circles.Our 2300MHz signal repeater and 1800/2300MHz signal repeaters can work  4g in the whole India

Q: Are your mobile signal repeaters certified?

A: Yes, all our signal repeaters are certified with CE certification.