If you set your Apple device to beta updates for the previous release you can suppress the constant prompts to upgrade. Reduces the chance of accidentally upgrading.
Be warned if you actually install beta software and take your device to the Apple Store they will not replace parts because of the chance the diagnostic tools aren’t compatible- this bit me trying to get my iPhone battery replaced
Be warned if you actually install beta software and take your device to the Apple Store they will not replace parts because of the chance the diagnostic tools aren’t compatible- this bit me trying to get my iPhone battery replaced