I have heard that just using old phones you will not be eavesdropping. If you have a phone with no storage, you do not have spyware installed.
Like some eavesdropping services, how can they eavesdrop on you?
Short answer to this is that you could have a very primitive phone, but the telephone provider records all calls. Over a period of time all recordings are overwritten. They started this initially for 911 but then expanded on this some for investigatory purposes into criminal or terrorist activities. This is how the USA is, but elsewhere in other countries the recordings may not be overwritten as often and eavesdropping could be without a court order. In the USA there is behind the scenes paperwork that has to be met in order for FBI to gain access to communication info. No form of communications is completely secure from being recorded unless physically isolated from providers of communications and range limited or encrypted private communications which could be recorded but unless someone has a means of decrypting the recorded scrambled message its worthless.
I used to watch news that a group was pretending to be a government person and asked the victim to transfer money to that account. What did they do to lure the victim into a trap? Because not all the victims are silly.
They gather info on their targets such as names of family members etc and use that as a tool against these people. The uneducated and gullible get taken for a ride. Additionally the demands in some cases should raise a red flag such as payment in prepaid cards for something.
I want to know about eavesdropping and how to avoid it and it's best to ask at an online forum.
If you are chatting about stuff that isnt illegal then there is no fear. Using a technology that is mass produced and a provider especially involved will always have eavesdropping recording of all communications at that provider. If you get a phone call for any reason where they want money hang up on them and wait for a bill in the mail and then check the return address on google to see if its the correct address to that identity. As long as you pay your bills on time etc I very much doubt you will see an increase in money requests by mail.