Xumo Setup PIN

I’m attempting to setup my Xumo stream box; however, I’m unable to link my Xfinity account during the setup on the Xumo box because I don’t have a PIN. I have attempted several times to input the last 4 digits of my phone number, 4444, and 0000 to no avail. I’m unable to watch TV using the Xumo stream box because I don’t have a valid PIN.