Who should call first when both has other's number?

Generally whoever gives in first will make the call. ... Really it doesn't matter. If you want to, you can call him. But then he really should make the next one after that.

Whoever cares most at any point should call. If he hasn't heard from you and thinks it, he should call, but if you call him first, so be it! Everybody wins! Never wait to call when it comes to your mind. So many missed opportunities over stuff like that.

Whoever realizes first that both of you having each other's numbers and neither of you calling each other is silly should be the first one to call.

If its been a day or two and he hasn't called you, give him a call. After all it is just a phone call, no strings attached.

I think that the guy should call first because if he really likes you then he would call but if he don't call then you should call him.

Well. If he doesn't call within a day. You can call him and ask how he's doing!