Filled out an application online followed by an assessment, took about 30 minutes. I received a phone call for a business-casual interview three days later. Interviewer uses the S.T.A.R. system. After these questions, the interviewer sat me with a rep to listen to calls for about 20 minutes (Nesting). I was told t-mobile will make a decision in five days, but received a email 2 hours later asking me to complete back round check. They use Hireright, which can be extremely annoying. It should be completed no more than ten days, just make sure you fill out the back round check completely and check on it after seven days. Check your email because a lot of the times they want more information before proceeding. After this was complete, I was offered the job, told about the meet - n - greet and when my class will start.