I understand why you would be interested in the 4G service!
After reviewing our coverage map at this link, I am showing that Grand Rapids is covered by 4G. Do you have a 4G device? If so, does it show 4G on the display?
You can also check at the following website, http://network4g.verizonwireless.com/#/coverage , to check coverage and sign up for updates.
I hope this information is helpful. Have a good day!