NOT KNOWN FACTS ABOUT SPAM CALLS

a person video clip called me yesterday 8/6/24 from my son's gmail , I assumed it was him then I answered, no one was there to reply, I hung up, then texted my son he reported it wasn't him, will that be a method for scammers to go into my phone and acquire my info???? what really should I do?I had to practice myself to reply the cellphone with "Wh