Clues to five new features have been unearthed on Google's social networking site fuelling speculation that the internet giant is taking on Facebook.
Technology expert Matt Mastracci found the yet to be announced updates when he was looking for a way to use the new "Circle sharing" feature before it was officially rolled out.
A programmer by trade and CTO of the tech startup Gripe, Mr Mastracci then revealed what he discovered on his blog read by FoxNews.com.
He said he found clues of potential Google Voice integration -- such as a setting labeled "Allow people to phone me from my profile".
This could open the door for free and easy phone calls with friends and family through the site, and take it head-to-head with Facebook's recent partnership with Skype.
Mr Mastracci said Google also looks to be taking on the likes of Yahoo Answers and Quora with what looks like an internal Q&A platform between users and designated "experts".
According to the code, Google promises that "you can get answers" from the "community in about 5 minutes!"
The blogger also uncovered evidence of that in future users will be able to write on each others' profiles - like Facebook.
One difference will be the sharing settings: "The messages will only be available to the person whose wall it is," he said.
The fourth discovery was a series of new photo options to compete with Facebook, such as being able to view photos sent from the messenger service.
Finally, the blogger said it looks like Google+ will have four privacy presets to allows users to choose how much information they share.
Interest in Google+ rocketed in the last week after the search giant opened up its social network to the public.
Stats from Experian Hitwise suggest it has already hit 50 million users.
A Google spokeswoman told FoxNews.com it doesn't comment on future products or features.
She added: "It's worth noting that we are always experimenting with new ways to improve Google+."
"Not every experiment makes it into the product, but we test new things on a regular basis."
Google Inc has stepped up efforts to digitize dozens of historical newspapers and make scanned images of the original papers available online, the Internet search leader said on Mo
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