Basically you apply online through their tpr link. Personally, I like to hand my resume to the manager in person as I feel it ups your chances in being selected for the position since they have seen your face.
Since handing in my resume, it took around a week for me to get a call and schedule an interview. I went into a TPR T-Mobile store and spoke to the RGM and we chatted about my experiences in sales, and about my personal life a bit. He talked a bit about the benefits with working with their TPR store, as he could tell from my expression that I had come to the dumb conclusion to think that this was a corporate store, such as health benefits for FULL-TIME employees and which was the position I was offered, spiff club for selling accessories, commission, and discount on plans. From there on, the RGM liked my responses and sent me another link in my email to take an assessment test that takes around 3 hours.
This assessment is crucial in getting you hired, a lot of potential new hires are disregarded if they fail this test and they don't make exemptions even if the store is short staffed, and the questions asked typically test you for your typing speed, reasoning, vocabulary, and personality although I believe it is utterly a waste of time and too incoherent to properly pass. If you pass miraculously the RGM then asks the owner of Mobility Innovation, John Wober, to check out your resume and score on said test to see if you get the approval to continue on to the offer. So it took me around 3 weeks from the application to my first day at this location however due to a lack of communication from upper management, I've seen potential new hires wait as long as 3 months to even hear a response.