Communication is changing so fast! Your phone gives you about 100 different ways to get in touch with someone. But, it still seems hard to get in touch with them!

The website Business Insider came up with four new rules for when you can expect to hear back from someone in 2014, based on how you try to get in touch with them. Here's what they've figured out…

If you call someone, that suggests it's urgent, so you should hear back within half an hour.

If you text someone, there's less urgency, so expect to hear back within two hours.

Surprisingly, if you send an instant message to someone, you're probably going to get ignored for a while, so expect to hear back some time that day.

And, if you email someone, don't expect to hear back for at LEAST a day.