Retail Sales applicants have rated the interview process at T-Mobile with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 67.8% positive. This is according to Glassdoor user ratings.
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Easy and basic questions you can find online. Just do your basic homework. Nothing was too difficult but just come in prepared. It was easy and there are slot 2/3 interviews before the position is offered to make sure you are a good fit.