If you wish to be one of the first to install iOS 10 or MacOS Sierra, this publication is for you. But before we start, you should know that beta products may present bugs. 
So that no error occurs and you can not "lower" operating system version later make sure that:
1. You have created at least one backup of your device through iTunes or your computer.
2. Do not use your main device
3. Wait a little longer duration ζωής και απόδοση της μπαταρίας
If after all that we mentioned above you still want her upgrade σε έκδοση beta, διαβάστε παρακάτω, αν όχι αλλάξτε σελίδα and… always friends.
For all consumers (upgrade will be available in July)
First, to get to Apple Software Beta Program you will need to use to connect your Apple ID.
You will then have to sign up for both iOS and MacOS Sierra to be selected by Apple. Follow the instructions carefully, and you will end up with a brilliant new beta profile for your phone and PC.
Then you have to wait, because unfortunately the public beta program for iOS 10 and MacOS Sierra starts in July.
If you are a developer (update is already available)
It is much easier, but also more expensive, because you will have to register with Apple Developer Program that costs $99 per year. Probably not worth it if you just want the beta.
Just log in to Apple Developer Download Center and follow the instructions.
