T-Mobile has a few different plan options that can save you money, but you have to meet certain requirements for some of them. For example, T-Mobile offers military, veterans and first responders a discount as well as those who are over 55 years old. If you don’t qualify for either of those, everyone is eligible to buy two lines, get a third free if you’re on an eligible Essentials, Go5G or Go5G Plus plan. Those on a Go5G Next plan will get a discounted third line for just $10 a month. With this offer, you can get three lines for as little as $90 a month. Like Verizon, T-Mobile also offers other bonuses like Netflix and Apple TV Plus subscriptions, and a free one-year AAA membership.