HabibHabibHabib Again back in the day of the first cellphones, the location tracking possibilities by the cell tower providers where limited to a few hundred meters. Is that correct?
That sounds plausible.
HabibHabibHabib Nowdays the triangulation is more precise, with an accurary up to +-2meters is this correct?
I have heard people expressing worry about that, but I don't know that to be true. I am skeptical that it's that good in general, though I admit I haven't read up on this recently.
HabibHabibHabib And if the phone modem now would change it's behaviour in response times (forced delays) than the cell tower would make a false assumption where the device is located, or the data would be unusable at all.
If the sole issue were round-trip time, sure. But cell sites also know direction (see "beamforming"). No matter how long a mobile device hypothetically delayed the time of a response, the response would still come from a measurable direction.
The cell sites are genuinely different than in "the old days". At least in urban areas, there are many more of them, and they do a lot more digital signal processing. This isn't a situation where a simple trick on handsets will turn back the clock on tracking.