Aurich Lawson In 2017, Kathleen Odean thought she had found the last cell phone plan she would ever need. T-Mobile was offering a mobile service for people age 55 and over, with an "Un-contract" guarantee that it would never raise prices. "I thought, wow, I can live out my days with this fixed plan," Odean, a Rhode Island resident who is now 70 years old, told Ars last week. Odean and her husband switched from Verizon to get the T-Mobile deal, which cost $60 a month for two lines. Despite its Un...