5-Band LTE Cellular Amplifier B20 B8 B7 B3 B1 800 900 1800 2100 2600Mhz GSM DCS WCDMA

5-Band LTE Cellular Amplifier B20 B8 B7 B3 B1 800 900 1800 2100 2600Mhz GSM DCS WCDMA
Five-Band LTE Cellular Amplifier B20 B8 B7 B3 B1 800 900 1800 2100 2600Mhz, GSM DCS WCDMA 2G 3G 4G 5G, Cellular Repeater
5-Band Cell Phone Signal Booster, Model B20 800 900 1800 2100 2600mhz, 2G 3G 4G, 101Repeater 4
Mobile Signal Booster, Repeater, Cellular Amplifier, Perseverance, 5 Bands, B1, B2, B25, v1.B4, B66, B5, B7, B8, B12, B17, B13, B14, B20, B28, 1013G, 4G, 5G
Specification
Frequency band: 5 bands from the list below
Band 12/17 700 MHz 5G 4G LTE+
Band 13,700MHZ 5G 4G LTE+
BAND 28 700MHZ 5G 4G LTE+
BAND 20 800MHZ 5G 4G LTE+
Band 8 900MHZ 2G GSM 3G
BAND 5 850MHZ CDMA 2G 3G
BAND 4/66 1700MHZ 4G LTE
BAND 3 1800MHZ 4G LTE
BAND 2/25 1900MHZ 3G
BAND 1 2100MHZ 3G wcdma UMTS
BAND 7 2600MHZ 5G 4G LTE+
- Gain: 70 dB
- Coverage: ~ 500 square meters
This booster works with the five-band B20 800 900 1800 2100 2600Mhz signal. The booster can only work if the frequency matches. Please check which band your cell phone is using first using the methods below:

The booster can only amplify the signal; it cannot create a signal. If there is no outdoor signal, the booster will not work for you. Please make sure you can make calls outside your room.

For iPhone:
Dial *3001#12345#*, then press the call button.
Click on 'Serving Cell Info'.
Check the Freq band indicator;

For Android phones (Xiaomi phones and HuaWei phones):
Download and install the LTE Discovery app, tap "SIGNALS" and check the band number.