LARGELY complete does not mean just a few isolated spots over a mile from my house and I see no indication that this will change in the next 2 weeks. The text encouraged us to upgrade to 4g phones, advertising 10x data speeds, so this does imply we should be able to use them within a month. Also, I am not a lawyer, but I am pretty sure a coorporation cannot make you sign away your rights when you use their product.
I have given Sprint the benefit of the doubt for the past year which is why I am still with them, but if they are advertising a mostly completed network with 4G in the next month, they better deliver.