Retrofitting 4G LTE to 2016 BMW M6?

[ExclusiveElectronics]

Hey guys,

I know BMW added the 4G LTE option to the BMW M6 Gran Coupe for the 2017 model but I was wondering if there was a way to retrofit it a 2016 model?

I know people say you can just tether your phone and what not, but ATT has an unlimited plan for vehicles for $15 a month and I rather do that.

Any information would be appreciated!