While this can be a good tip, if can also be infuriating to the people on the other end of the phone if you are unknowingly calling a small business. My company only has 8 employees and one of the items we sell is a consumer product.
People are forever calling and then immediately calling back, obviously trying to get a different person or a different answer. Fortunately for us (unfortunately for them) most of the things they are calling about are pretty black and white.
This happens to me all the time at work. I work in the credit department of a company and we get calls all the time. Problem for them is our department consists of 3 people, all within ears range. I had someone try and tell me they had a guy on the phone last month that promised them :: insert request here :: and I had to fight back the urge to laugh as we havent had a guy working there in almost 3 years. They think we are some huge call center.
The trick to getting what you want or are entitled to is to stay calm, not get defensive, and know your rights. A lot of times people in customer service/retail have a lot of power but if they dont like you they wont help you. Always ask for their name and employee number before asking to speak with their supervisor or threatening to call hq or contact the bbb. Contact their supervisor first then threaten with the bbb. Works like a charm.
Glad you got your phone! I had major problems back in the day with tmobile and just ate the cost and switched. If I had been talked to like that and called a liar things would have gotten ugly real fast. 6 years in customer service makes you almost hostile in situations like that.