I can't share the contact details in iPhone 6 via message

Good day mittal0838,

To share a contact from your iPhone using Messages, do the following starting in the Contacts app -

1. Tap the contact, then tap Share Contact (near the bottom of the screen.)
2. Select Message from the methods to share.
3. The phone switches to the Messages app. Enter the destination you wish to share to.
4. Add any further comments.
5. Tap Send.

See the iPhone manual for information about sharing contacts (page 147) -

https://manuals.info.apple.com/MANUALS/1000/MA1565/en_US/iphone_user_guide.pdf

Thanks for using Apple Support Communities.

Safe computing.