Before new versions of systems are released for smartphones in stable versions, companies always have to carry out several months of tests. Typically, these tests take place in closed, relatively small groups that provide developers with information about system errors, which allows for fairly accurate preparation of the system in a stable version before the official premiere. There is a chance for people who want to join the closed group of OnePlus' beta testers. The company begins official recruitment to its groups dealing with software testing.

To be a candidate to this closed group, you must meet three conditions: you must have a phone from the OnePlus 7T series, you must be an active member of the OnePlus community (among others, forum activity is counted), and you must communicate with the company and provide company feedback about the system through  Slack. OnePlus has announced that firm needs 250 new testers, but you do not have to hurry because the company will get to know all the candidates and after analyzing their CVs OnePlus will choose the right candidates. The official form for candidates is available on the manufacturer's website.

source