i have an iphone 13 for 3 years. i pay $73 a month now on my basic plan with t Mobile. i want to upgrade to an iphone 16 pro but its going to cost an extra $30 a month. what are my options for getting a 16 pro and staying at my current monthly price?

我的 iPhone 13 已经用了 3 年。我现在的基础套餐每月付给 T-Mobile 73 美元。我想升级到 iPhone 16 Pro，但这样每月要多花 30 美元。有什么办法能让我升级到 16 Pro 同时保持每月费用不变吗？