Credit: Joe Maring / Android AuthorityAt the beginning of the summer, T-Mobile announced plans to kill many of its oldest legacy tiers, effectively forcing customers onto newer plans. It’s not the company’s first time trying a move like this, but this time, it’s not backing down so easily.Naturally, legacy customers are less than thrilled. Many are exploring alternative carriers, while others have escalated their frustration by filing official complaints with the FCC. The agency has given T-Mobile a July 31st deadline to justify the change before making a further ruling.