Text from which number?

[Windows Central Question]

Hi guys,

I'm using Lumia 720, running on Windows Phone 8.1 .
Just wanted to know, I have a contact which has more than one phone number.
When texting I know I can switch the contact's number and I texted to 2 numbers (same contact/person). BUT how to know the person texting back ie reply using which number?

Thank you.

 

[anon9169769]

Best way is to write down one number and delete it from the phone then send a text to that remaining number and see what happens