Who called from 2132575233

On the iPhone, hit phone, then missed calls or recents, then hit the circled i to the right.  Scroll down to where it says 'Block Caller'
On the Android, there is also a block caller when you hit phone.

Thanks I am glad to finally find out how

THANK YOU for that valuable info!!

Thanks.. I was trying to figure out how to  access this function.

On the Android (Samsung specifically), open Phone; got to RECENT; press # you want to block until the menu comes up; select "move to reject list" and there it is.  Do the same if to remove from the reject list if you accidentally chose a different number.