Share your contact details by Bluetooth.

There are at least 4 ways of sending your contact details from one
phone to another.
1. Dictate your phone number,etc for the other person to save on his/her phone.
2. Insert your SIM into the other phone and use COPY CONTACTS to copy
your details into the phone.
3. Insert his/her SIM into your phone and use COPY CONTACTS to copy
your details into his/her SIM.
4. Send your contact details to the other phone by Bluetooth.

To use Method 4, tell the other person to switch on his/her Bluetooth.
On your own phone, scroll to your contact name and press OPTIONS,
MORE, CONTACT CARD and VIA BLUETOOTH. Press DEFAULT NUMBER or ALL
DETAILS. Use NEW SEARCH or PAIRED DEVICES to connect to the other
phone and send your details.

NOTE: The above procedure was used on my Nokia Asha 210 phone. There
may be variations from one phone brand to another.