Question

if any simple person know any person email address then how can we get information about their phones​

Answer 1

there are two methods legal and illegal by the way you think it depends on it

mark as brain liest

Answer 2

you have two method:-

1) legal :- go to him ask directly

2) illegal (hacking):- send some malware or infected files, link so that he may get into our traps.

Social Engineering is the best to approach on any phones.

You may also use RAT tools to this purpose.

Hacking is illegal. Do it on your own risk