Download the Chrome app from Chrome Store on Google Chrome. Once installed, just click on the icon on Chrome and you will be redirected to the sign-up page of Google+. Sign in with your Google account and your account must have a proper Google Profile. Since, Google is constantly trying to block these loopholes, as they are over capacity at the moment, they might try to stop these workarounds.So act quick. What you just need is a Google Chrome browser. Enjoy Folks.