Tri Band 850/ 1900 /2100MHz 2g 3G 4G Signal Repeater St-Cpw27

GSM repeater tri band 850/1900/2100mhz cellphone booster 2g 3g 4g signal amplifier  Product Description Why do you need to buy repeater/booster ?  Unfortunately,there are still no signal in some places,for example:-Parking lots,tunnels-Big store-Car,boats,office building-House in remote ar

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