Around two years ago, T-Mobile introduced its ONE Unlimited 55+ plan, which, as the name suggests, was only available to individuals 55 years of age and up. It was actually a pretty good deal for those eligible, but the name has changed and the price has since risen to $70/month. This new 55+ plan is called Essentials Unlimited 55, and it's cheaper at $55 per month for two lines. Yes, that's a lot of fives.

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