increase cell phone signal strength

{"title":"Tri Band Cell Phone Signal Boosters Extender 1800MHz 2100MHz 2600MHz 70dB Gain","imgUrl":"https:\/\/img.chinax.com\/nimg\/45\/c7\/804811f3701321d1cba5217df19a-200x200-1.jpg","attrs":{"Price":"Contact Us","Brand Name":"GREETWIN","Model Number":"GW-20DWL-NH","Minimum Order Quantity":"1pcs","Delivery Time":"3 Working Days After Received Payment","Certification":"SGS, ISO9001,CE,ROHS","Place of Origin":"China","Payment Terms":"T\/T, L\/C","Supply Ability":"5000pcs per Month","Packaging Details":"Carton with PE Foam","Product Name":"1800 \/ 2100 \/ 2600 Cell Phone Booster","Frequency range":"1800 \/ 2100 \/ 2600MHz","Advantage":"Increase Voice, Text Signal Strength","VSWR":"\u2264 2.0","Bandwidth":"Wide Band","Manual Gain Control":"31dB \/ 1dB Step","Gain":"70dB","Output Power":"20dBm"}}

{"title":"5V DC Power Bank GPS Tracker Detector 2G\/3G\/4G 8 LEDs Signal Strength Indication","imgUrl":"https:\/\/img.chinax.com\/nimg\/f4\/57\/11bc9599ff5a1919008b2d9639ae-200x200-1.jpg","attrs":{"Price":"negotiate","Brand Name":"Sacontelecom","Model Number":"SH-055UGTC","Minimum Order Quantity":"5PCS","Delivery Time":"3 working days after receive payment","Certification":"CE ISO9001 Rohs","Place of Origin":"China","Payment Terms":"L\/C, T\/T, Western Union, , Paypal","Supply Ability":"10000pcs\/month","Packaging Details":"Neutral Packing Carton Box","Product Name":"GPS Tracker Detector","Detectin Object:":"2G \/ 3G \/ 4G GPS Tracker, Bug (hidden Microphone), Spy Camer","Detecting Distance:":"About 3 ~ 5 Meters * The Detecting Distance Will Be Varied Depending On The Environment And The Brand, The Cell Network Of GPS Tracker","Power:":"5V DC Power Bank","Dimension:":"L 11.6 X W 7 X T 3.3 Cm (not Include Antenna)","Weight:":"About 160g (not Include Battery)"}}