T-Mobile's prepaid unit unveiled four new plans on Tuesday that provide a five-year price guarantee and monthly charges as low as $25 per line, as the company seeks to shield its market share from competition amid economic uncertainty.

T-Mobile talks a big game about hundreds of dollars in added value, but for most consumers it's a lot harder to see how any of it matters.

Skepticism aside, T-Mobile and Metro's 5-year promise of no new price hikes is a good start. See all their new plans and perks here