How to use without simcard whatsapp

hai frands to day i am invited application is 2ndLine ,2ndLine is a second US or CA phone number that works on your smartphone, tablets as a full-featured business phone system, designed for mobile professionals, freelancers, and entrepreneurs. Call and message from a separate number on devices you and your team already have, via Wi-Fi or your existing cellular network, with anyone in the U.S. and Canada.

this app is Professionalize your business. Stay connected to customers with a low cost, reliable second phone line through 2ndLine and You can send as many text messages as you want to US & Canada
Make unlimited free phone calls to any phone number in the US & Canada!

send and receive your texts directly via 2ndLine – use 2ndLine as your one-stop SMS texting app! or Unlimited voice calls with other 2ndLine users as well as for incoming calls and Full picture messaging : send, receive and save pictures,Voicemail Transcription,Call Forwarding . Google SmartLock: no need to remember your password,Signatures: add your own signature to each text, Assign individual contacts their own ringtone & background, Customizable text-tone, ringtone & vibration, Customizable backgrounds, Home screen widget to launch 2ndLine, compose a new message or quickly make a call, Prioritized Support, Real SMS texting and calling: text and call ANY phone that accepts SMS texting, and ANY phone for calling.