Is there a way to boost cell phone signal - boost my mobile phone signal

Cell Phone Jammer/Blocker for CDMA/GSM/3G2100MHz/4glte Cellphone/Wi-Fi/Bluetooth Room Jammer/Blocker for cellphone /Wi-Fi Vodasafe S8 Brief Description： Vodasafe Room jammer S8 is best Global using in rooms . S8 mainly Jamming all types of mobile phones, Wi-Fi/Bluetooth etc. Create a “prohibited” area with a radius of 50 meters for all wireless devices, in the coverage area. They will not be able to send messages, answer calls and they will lose the ability to access the Internet. Features: *Adjustable jamming range  *Friendly use and maintenance *24/7hours working, Could continue to work *Good cooling system with unique case as big heat sink and 3 fans inside *External Omni-directional antennas  *all the TX frequency covered down link only not inference base station Applicable place:  It can be applied in a meeting room, conference room, museum, gallery, theater, concert hall, church, temple, restaurant, classroom, training center, factory, etc. Specification: Total Output Power:17 Watt 1-3W each band Cover Radius: 10-40m(under Signal level ≤-85dBm)@according to the signal density mobile network Jamming type: Sweep Jamming Antenna Type: 3dBi external omni-directional Power Supply: AC adapter (50 to 60Hz/100 to 240V AC –DC5V)  Electric Filed (SAR): Compatible with ICNIRP Standards (Human safe) Operating Temp:-20 to +50℃ Storage Temp:-40 to +60℃ Humidity: 5%-80% Dimension(LXWXH): 355 x 135x 50mm not include antennas Inner box dimension:470x270x13mm Weight:3kg Notices: 1.Before linking all the antenna, power supply shall not be switched on at first. On taking off antenna when the mainframe is in the working condition. 2.The Jammer shall be installed in the position with good ventilation. And large-scale things shall be avoided to ensure to the shielding effect. 3.When use the jammer outdoors, preventing water shall be taken into consideration. 4.Antenna shall be used vertical to the ground. Order Information : S8: CDMA/GSM/3G2100MHz/4GLTE Cellphone/Wi-Fi/Bluetooth Global using .America Type frequency for  United States, Canada, Mexico ,S. America. Europe, Asia, Australia, Middle East, Africa. 1.2GGSM/CDMA850MHz:850-894MHz;3W 2.2GGSM1900MHz:1920-1990MHz;2W (2GGSM/CDMA/PCS1900MHz) 3.4GLTE700MHz:700-821MHz;3W 4.3G2100MHz:2100-2170MHz;2W(3GUMTS/WCDMA/TD-SCDMA/CDMA) 5. Wi-Fi/Bluetooth2.4G:2400-2500MHz;1W  6. 4G WiMAX/4GLTE2600MHz:2500-2700MHz;1W or 2300-2400Mhz 7. GSM900MHz:925-960MHz; 3W 8. 2GGSM1800MHz:1805-1880MHz; 2W (GSM/CDMA/DCS) Total Output Power: 17W Package contents: 1pcs Signal Jammer 1pcs AC Charger 8pcs Antenna 

is there a way to boost cell phone signal

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