Well,  I am currently using phd writing service https://www.theunitutor.com/phd-thesis/  to write a thesis really fast. They helped me with a history essay because I am soooo bad in all these and it's not my obligatory subject. A lot of students in my group are working too much and are busy, so they use some essay writing services to help them. I think that it's nothing to be worry about.

If your research has been progressing well, you have published a few (relevant) papers, and you have written those papers by yourself, and you have no other things to do, then 3 months should be more than enough. You just need to dump everything you have done into the thesis. Dumping is indeed an appropriate term because nobody other than your supervisor and your thesis examiners will ever care about what is written there.

If you haven’t done the research, then no, 3 months is not going to be enough.

Is it possible to write PHD thesis under 3 months?