True, but you still need to fill SS4 Application form CORRECTLY. I have seen people do messy︀ stuff with their application, so my recommendation is to hire a professional.
As for the︁ call, of course you do not need to call. IRS will mail/fax original letter to︂ your mailing address indiciated on the SS4 form. Calling them can get you the number︃ a few days faster over the phone, but you will still have to wait for︄ the original confirmation to arrive to your address.