Final answer:
The cost of the first line with T-Mobile ONE varies and is influenced by current promotions, the total number of lines, and eligibility for special discounts. Accurate pricing can be obtained by contacting T-Mobile directly or visiting their website.
Step-by-step explanation:
The price of the first line with T-Mobile ONE varies depending on the promotions and offers that T-Mobile has at a given time. Generally, though, T-Mobile offers different pricing tiers for their plans, with the T-Mobile ONE plan being a part of the carrier's unlimited offerings. To get the most accurate and up-to-date pricing information, it is best to visit a T-Mobile store or check the official T-Mobile website.
Factors such as whether you are adding a new line, the number of lines you intend to have, and whether you are eligible for any special discounts (like for military, senior citizens, or families) can greatly affect the monthly cost of your plan.
To get the specific cost for the first line under the T-Mobile ONE plan, you would require information that is most current, and since prices and promotions can change, the best way to get this information is directly from the source – T-Mobile.