I recently was looking to switch plans from one major cell phone carrier to another, which included a promo for a free phone. This was done in the United States. At the point where I was to sign that I would agree to the terms of service for the plan and promo, I asked to see a full copy of the terms. I was told that I would not be allowed to obtain a full copy of the terms until after I signed.
This struck me as odd, but I did some research and it turns out this is standard practice for that carrier.
Are these sorts of contracts fully binding once I sign them, even though I am not allowed to see what I am signing? Is there any law that would allow me to break the contract if I see problematic or contrary terms once I am allowed to view it?