I got a Verizon MiFi a few months back because I needed good coverage with 3G in rural Kansas, and I will admit to Verizon having superb coverage in that scenario. However, from the moment I walked into the store I was lied to about everything under the sun, not to mention the crap I got for having an iPhone, when I said "I could get a MiFi, or walk out, porting over to Verizon and getting a second line with a Droid is not an option," they shut up. Needless to say, I have been on the phone once a month with billing issues, lies, followed by lies. Now I am not saying AT&T has halo's over their heads, but I have never been so flat out lied to the way I have consistently been with Verizon. "Your first bill will be around $60" Yeah, my first bill was around $135. Thanks for that.
In conclusion, yeah, they will lie lie lie to get you to buy their product, its why I could never been in that line of work, I can't lie to people about things like that.