Sprint/T-Mobile Lease Breach of Contract

So this is gonna cost T-Mobile in a lawsuit because people who grandfathered in from Sprint, their literally videos and articles and everything where T-Mobile guaranteed price lack for life it doesn’t matter what their contract says because they’re verbal contract and their advertising stated that if you stayed with them from Sprint that you would have a price lock if you grandfathered in from the Kickstarter plan so I’ve talked to two lawyers and I will be filing a lawsuit. Anyone who wants to join let me know.