how to make gsm signal booster

{"cid":"91206471","title":"Indoor Cell Phone 70dB GSM Signal Booster With LCD Real Time Display","imgUrl":"https:\/\/img.ismap.com\/nimg\/1f\/c6\/ff46cae81a539e2e6f238b16ef40-200x200-1.jpg","attrs":{"Price":"USD+40---49+kit","Brand Name":"ATNJ","Model Number":"AS-G","Minimum Order Quantity":"5Pcs","Delivery Time":"3-5 work days","Certification":"CE,ROHS\uff0cCCC\uff0cTUV,BV\uff0c ISO","Place of Origin":"China","Payment Terms":"T\/T, Western Union,Paypal,Alibaba,Bank transfering.","Supply Ability":"1000+unit+per day.","Packaging Details":"Standard neutral packing,54x19x16cm(1 kit), 6kits as 1 carton(53x49x42cm)","Frequency Range":"890-915MHz\/935-960MHz","Gain":"70dB,UL Gp\u226568 DL Gp\u226570, Uplink Gp\u226568dB Downlink Gp\u226568dB,","Output power":"17-20dBm","Color":"White,Blue,Customized","AGC Intelligent function":"Done,31dB @ 1dB\/ Step","MGC\u3001ALC Intelligent function":"Done","RF Connect Type":"SMA\/Female Connector","Power Supply":"AC 110~220V\u00b120%, 50\/60Hz(AC 220V\/ DC5V\/2A power adapter)","Inter-Modulation Attenuation ACPR":"\u2264 -40dBc \/ 30kHz (measured under rated output power)","Weight":"1.85kg","Packing size":"54x19x16cm","Products type":"cellular amplifier"}}

{"cid":"91171109","title":"900\/2100mhz Dual Band GSM UMTS Mobile Signal Booster","imgUrl":"https:\/\/img.ismap.com\/nimg\/7e\/82\/ea8c87a7e0d508c8557d88b509fc-200x200-1.jpg","attrs":{"Price":"US $157.7-178.9 Piece","Brand Name":"GREETWIN","Model Number":"GW-20GW","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":"GSM900 WCDMA2100Mhz Signal Extender","Application":"Basement, hotel,Office","Intelligent":"LED Digital Panel","Alarm LED":"If Self oscillation, it is black color","Features":"Digital Display Panel","HS CODE":"8543709200","Spec":"BTS for outdoor, MS for indoor","Operating Temp:":"-20\u2103 to +55\u2103"}}

{"cid":"90030402","title":"CE \/ ROHS Cell Phone Signal Booster \/ Blocker With Omni - Directional Antennas","imgUrl":"https:\/\/img.ismap.com\/nimg\/ef\/d9\/c65e8f7108336570b422c3584430-200x200-1.jpg","attrs":{"Brand Name":"EST","Model Number":"EST-808SG","Minimum Order Quantity":"1pcs","Delivery Time":"1-3 working days after received the full payment","Certification":"CE&ROHS","Place of Origin":"China guangdong","Payment Terms":"100% before shipment","Supply Ability":"500pcs\/week\/C","Packaging Details":"neutral packing"}}