is there a way , i know there is a way to boost or capture a signal. say for a iphone and i dont know the frequencies. here is the prob. my job is in a basement office my cell will not pick up the signal. my friends fone work. but there on another carrier. some one give me idea to either boost my incoming an outgoing signals. i dont have much money but if any of you will i know you know how to . thanks rick. bmet p.s. i have access to oscopes and signal generators if that could be used for signal amplification.
Answer is you cant !! Unfortunately you are governed by the cell site which sends commands to your mobile phone instructing your phone to either down power or up power on RF out
The second problem that you have is not just down to cell site location but also down to atmospherics, buildings etc, drop out areas , weather changes
Your phone has to be sensitive to a certain degree in order to receive broadcasts from the site If that is insufficient to start with and you cant get reception your phone will not be able to register on the site and so you obtain what is called no service available
If you did try to increase the power you would certainly get into stacks of trouble because they would pick this up straight away meaning you would be facing prosecution for interfering with BT telecoms That’s a heavy duty fine and possible imprisonment and of course these days they confiscate your equipment
You could however use what the call a passive antenna into the building which picks up what ever signal is their and propagates the signal into the building Such methods have been used in the Dartford tunnel
The only other suggestion that I can make is develop a software interface for a PC remotely attached to your mobile phone which is networked to that in your office and then use that application to either call or send sms Other than this its down to commercial products that are available on the market which enable you to send free sms with replies
I think you can do it and still be legal. Here is what I would try.
# Identify the frequency band you want to amplify. You may need to make a measurement for this. # Get (build, purchase, or reuse) an antenna with high gain. I am not suggesting use a power amplifier, but a passive antenna like a dish or something directional with high antenna gain. # Point the antenna at the cell tower. # Run a coax from the dish to your office. # Connect another antenna to the other side. It could be a patch antenna, dipole, etc)
You will want to pay attention to the impedance of the antennas and the cable and make sure they match. Maybe Dave Cuthbert will chime in he is an antenna guru.
That’s the only answer there is to this NO "Don’t do it !!"
Or do what I said attach your mobile to a pc and operate remotely with suitable software to make and send sms That’s the only other way to do this
Its highly illegal to do what you are doing and you will get caught
Dont kid yourself You will get caught !!
I couldn’t spell this out for you any clearer than I have already plus I think you ought to also consider political circumstances at the moment They are connected with anti terrorist laws and they could and might possibly investigate you under the terrorist act !! Their interpretation will be that you are obstructing and causing mayhem with communications which could be deemed as an act of intended terror with a view to disrupting communications systems such that you may or might have the intention of committing or attempting to commit an act of terror by blocking other persons communications systems with possible disruption to emergency services
So don’t play into their hands
They are going mental in the UK Just over phone hacking which I think is quite daft especially as they have left themselves wide open to this never the less they are going bezerk just over this and Im one for agreeing with hacking to a certain extent especially when they don’t listen to engineers
Its not however illegal to connect you mobile to a PC and automate or use remotely that is perfectly legal They cant do you for that at all
Advice stay within the scope of the legal system surrounding communications
This technique is called passive reflection, and has been used for decades by people in isolated valleys, etc. for difficult reception scenarios. As long as there is no amplification involved, you are perfectly legal.
Hi! I hope some of you are still there. I´m from a rural area and mobile phone signal weakens a lot as soon as you leave your town. I considered buying an amplifier but they are quite expensive, so I started looking for a way to do it myself. I couldn´t find any schematics for this kind of amplifier on this website. Do you know where I can find it? My provider frecuency is 703-713 or 758-768 [MHz]
Boosting iPhone cellular signal in a basement office is challenging due to regulatory restrictions and technical limitations. Mobile phones adjust their RF output power based on commands from the cell site, preventing unauthorized signal amplification. Illegal attempts to increase transmission power risk severe legal penalties, including fines and imprisonment. A legal and practical approach involves using passive high-gain directional antennas to capture and relay signals from the cell tower into the building without active amplification. This setup requires identifying the correct frequency bands, matching antenna and cable impedance, and positioning antennas to optimize reception. Passive reflection techniques can improve signal reception in difficult environments without violating regulations. Access to oscilloscopes and signal generators may assist in measuring frequencies and tuning antennas but cannot be used to amplify signals legally. Commercial RF amplifiers exist but are costly and may require professional installation. Frequencies around 700 MHz bands are typical for some providers, relevant for antenna design considerations. Summary generated by the language model.
