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T-Mobile 'Jump' Plan to Require Customers to Pay 50% of Device Cost Before Upgrading. Friday February 14, 2014 10:58 AM PST by Juli Clover. T-Mobile is planning to implement some changes to its Jump early upgrade program, according to TmoNews.
Ok, so here is plot of the price per month versus the data plan. From this plot we can see that the y-intercept is $65.33 and the slope is $5.42 per GB. You can also see that the jump in price from no data to 200 MB is crazy out of proportion. So, the $65.33 must be how much you pay for unlimited voice and text.T-Mobile also offers different data plans for 500 minutes of talk.hat I would like to get is a comparison of how much it costs to get your data for a mobile device. In this case, you can have three things: data (really they are all data), voice, and text messages. Typically, a service provider will charge you differently for these different things.