https://wccftech.com/oneplus-7-and-7-pro-closed-beta-now-live-with-just-250-slots-available/ > OnePlus, much like many other OEMs, has several tiers of software. There’s the Stable version that all phones ship with, an Open Beta for testing new features, and Closed Beta that lets users test even newer, experimental features under NDA.  Users involved in the closed beta have significantly more responsibilities than the ones participating in open beta and are expected to test the software more rigorously. OnePlus just announced a closed beta for their latest flagships the OnePlus 7 and OnePlus 7 Pro. There are only 250 slots available and users need to fulfil the following criteria: > The Closed Beta Group is the closest group to OnePlus staff. The group needs to operate in absolute secrecy, as testers will often get builds and features weeks or even months before they are released to the public. Additionally, users are required to sign a Non-Disclosure Agreement with OnePlus to be part of this program.