How can i change my metro pcs phone number?

I already have an activated phone i just need to change the numberHow can i change my metro pcs phone number?
I'm not familiar with Metro PCS, but if that's just a regular cell phone service provider, then all you do is dial 611 from your phone and ask customer service to change your phone number. This should be free of charge. I've changed my phone number multiple times with T-Mobile.