t-mobile Home Internet - Location Issue

I can't believe this is how cellular works. I am in Iowa but my computer says I'm in Minnesota. So when I sign in to my online banking, they always send me a notice of a log in from Minnesota as do some other's and I have to answer of it was me or not. When I do a google search, it will take me to the site in Minnesota so I have to delete it and put in my correct address.

THis is a big annoyance when I'm paying good money for service. Additionally, I was not informed of this when I signed up with you. If not corrected, I will be changing servers and alert others to this problem