My smart phone reads my mind!

It's alarming or annoying, but not strange.

Google analyses what you write faster you can type it, and by also using information amassed about you (including URL?) by much of your Internet and (if you have one) "smart"-'phone use, it is very quick to recognise what you were asking for.

I have found looking for anything on-line now usually releases a flood of advertising links, of which very few are the slightest bit relevant to the subject!

That's probably by crude text-matching though, because I do not use the Internet in ways easy for MS, Google, Amazon et al to trace me. I do not use Internet banking; I limit my other financial on-line use to the minimum; my on-line shopping is rare, irregular and not likely to interest Californian advertising-agencies.

I also refuse to use Facebook and Twitter, and refuse to own a so-called "smart"-'phone or an eavesdropper like Alexa; which is eerily parallel to the "telescreen" in the 1930s-written novel you cite.

When I do take my basic portable telephone with me, I leave it switched off so making tracing harder. In fact I leave it at home more often than not!

(Any telephone, fixed or portable, does need its system know where it is electronically, otherwise it would not work.)