Hello @futureskills and @jvasquez,
I just release the latest version of International Telephone Input for Contact Form 7 that includes a new option: Default value/Placeholder. Now you can set a default or placeholder value for the telephone input. See the changelog here.
To add this option to an existent form-tag, just enter the placeholder
parameter followed by the placeholder message enclosed in quotes, e.g. "Please enter your phone"
, this way:
[intl_tel your-phone placeholder "Please enter your phone"]
You can also add a new international telephone input with placeholder using the form tag generator. Just enter your message in the Default value field and check the checkbox below:

I hope this information it’s useful to you.
Best regards,
Yordan.