Meta Human Resources interview questions

First interview with a recruiter over the phone, then another with hiring manager via Skype-like client, then another in their office with my own phone. Met with 3 people in the office, was asked to call from my own phone to the other 2 who were not in the office (?). Very disorganized. Hiring manager asked me to make calls to people in other offices from my own smart phone. I was asked to download apps to make these calls, which I did, and then the internal Wifi would not work so I had to dial out to them. This is a trillion dollar company on the cutting edge of technology, surprisingly disorganized.