I don't think you need to do this; What if there is no opposite effect? Because the details haven't been decided yet, that is to say, if so, can you really work in the company you called? If you really make a phone call, won't it make the other party feel speechless? Isn't it? Unless you want to know the specific situation of their unit (but it is introduced on the website), so I don't think it is necessary. Besides, do they have the time and energy to deal with you? Have you thought about it all? And if you think so, then is the other person thinking the same as you, do you value them or have other plans? These are not good for you, because you want you to take them into account.
Go your own way anyway. We only have an outsider who can give you some advice on where to go. Just make up your mind. Finally, I hope it goes well!