Learn how to enable free calls on WhatsApp

Brian Action, creator of WhatsApp a year ago had announced that the application would have the option of free call and is finally available .

To enable these calls follow these simple steps:

1. Download the new version of WhatsApp or update it from Google Store.

2. It is necessary to receive the call for Whatsapp of a contact that already have this feature enabled so that you activate the interface and the option to call.

3. Once the call is received, the function will be available in the recipient's account , which in turn can make calls to go spreading the service.

4. Answer and wait a few seconds, then hangs up.

5. Close the application and when you open it again and have the new interface.

The sound quality is very good but experienced a delay in the arrival of audio, as the proper functioning of this tool telephony depends on a good internet connection .

For now only works on Android and Blackberry 10 will soon Diponible on iOS and Windows Phone.

Tell us if you worked!

SUMMER SOLSTICE - WHY IT'S THE FIRST DAY OF SUMMER

Solstice is a result of the earth's north-south axis "is being tilted 23.5 degrees relative to the sun. Tilt causes different amounts of sunlight to reach different areas of practice crystal.

Today, the North Pole is tilted closest to the sun than any other day performance monitoring reports of other quanao 2010. Contrary is also true for the Southern Hemisphere, which today is the winter solstice, the shortest day of the year.

As a result, at high noon on the first day of summer, sun surveillance reports appears at the highest point in the sky-its most directly on-location in the Northern Hemisphere.

That does not mean that the sun will be exactly cost effective monitoring report on bbao quauoi lunch for everyone, said James Bell, an astronomer at Cornell University in New York.

It depends on the viewer's latitude-the sun shines down right on top vabao performance monitoring report gifts noon at the Tropic of Cancer. monitoring report "It is still at a low angle if you're up in Turkey", Bell explained.

No matter where you are in the northern hemisphere, the sun's path across the sky-which increase the lead-up to the first day tibao Co. residents report monitoring performance of the summer, then begins descending compared with rest of the summer-does not seem to change the environment in several company days before and after the summer solstice.

In fact, the position of the sun still change, but with a slower pace.

(Related story:. "In Scandinavia, Solstice Means Fun in the Midnight Sun")

Summer Solstice vibrations About Calendar

While the media usually occurs in June on the same day every year, every day changes every once respected company tinmot time environment. For example, in 2008, the summer solstice occurs on June 20.

This shift in date is the result of the difference between a human calendar year is usually calculated as 365 days a year and astronomy, which is 365.25 days.

The system that our leap year adds an extra day every four years calendar, ensuring environmental company tinlich our reputation is accurate, but it also causes day just to flop around a bit.

"Nothing changes astronomy. Changes What is the human aspect of it," Bell said.

Chi is the longest day of the year-not the Hottest

On the summer solstice, the northern hemisphere receives sunlight than any other day of the year, but dCty tinieu environmental authority that does not mean the first day of summer is also the hottest day of the summer.

Oceans and the earth's atmosphere acts as Environmental compact radiator, absorbing and respected environmental re radiating Tina tiCty sun over time. So, even though the planet is absorbing more sunlight on the summer solstice, it takes several weeks to release it. As a result, the hottest days of summer usually occur in July or August.

"If you think about moving up the oven takes a long time it heats up," explained Robert Howell, an astronomer at the University of Wyoming. "And then when you turn it off, it takes a while for it to cool down. This is similar to Earth."

The first day of summer celebration originates ancient

Summer solstice is recognized and regularly held in many cultures environmental consulting chemistry world, environmental consulting quality in both past and present.

Ancient Egypt, for example, built the Pyramids to sunset even when viewed from the Sphinx, located exactly between two of the Pyramid.

Inca of South America celebrated the summer solstice with a ceremony called Inti Raymi, which included food service environmental consulting and sacrifice animals and even people. (See pictures of a summer festival Inca press.)

And perhaps the most famous, Stonehenge in England have been associated with the winter solstice and summer for about 5,000 years.

Observations in the center of the standing stones can watch the summer solstice sun rise over the heel stone quality environmental consulting, stands just outside Stonehenge's stone circles.

For many of the ancients, though, the summer solstice is not just an excuse to party or pray-it is necessary to their happiness.

Concerning agriculture, the summer solstice was a reminder that a turning point in the growing season has been achieved.

"The schedule is very important-more important than now," said Ricky Patterson, an astronomer at the quality environmental consulting the University of Virginia. "People want to know what will happen so they can get ready."