How do I add email details tophone numbers already saved?

[JanetLorna]

How do I add email details to phone numbers already saved on my Vodaphone pay as you go? 

[BandOfBrothers]

Hi,

If you mean add a persons email address to a contact saved on your iPhone 7....,,

Open the Contacts App and choose your contact.

Press edit. 

The email contact field will be in there. 

Add the email address.