Sending contact info from your phone to a clients phone via text puts you right into their contacts list, is convenient and efficient. 

But don't discount the value of the business card. It is tried & true, it can reflect your business personality & culture in both language and graphic design. 

Have your card professionally printed....  DIY cards subliminally imply you are a "rookie"! If you want to be perceived as a professional invest in yourself. 

We use multiple styles of business cards, with different messages, for different purposes; types of clients, recruiting, specific products. 

Remember your card is a tool that only works if you have them with you, and give them away!