How To Access Inbox By Gmail App Without Invite?

Its been few days Google launched its new Inbox by Gmail app. However, Google still offers invite-only access to the app. There's still a way to access this app, with the help of your friend who has got an official invite.
Here's the easy process to follow:

Download Inbox on your phone through its app store, either Android or iOS. You won't be able to sign in with your account, since you don't have access, but download it anyway.
Have your friend log into their Google Account to your phone. For Android, you'll want to do this under Settings > Accounts. On iOS devices, log in through another Google app, like Gmail or Chrome.
Open Inbox and, when prompted, choose their account to sign in.
Go to Inbox's settings and select "Manage Accounts". Flip the switch for your account to "on". You should now have access to Inbox on your account.
Remove your friend's account from your phone. Again, on Android, do this through Settings > Accounts. On iOS, head back to the "Manage Accounts" screen in a Google app, tap "Edit", and delete your friend's account.

This way you can access the Inbox app when your friend logs out of your device. However, this can be done only by those who have official invite.
Read original and detailed steps #-Link-Snipped-#.
via Lifehacker