After looking at another Galaxy S4 leaked image yesterday, we now have a new report for you offering more details about Samsung’s Galaxy S4 launch event and launch schedule.

According to Sam Mobile’s “trusted insider,” Samsung plans to announce the Galaxy S4 on March 15 at a special Mobile Unpacked event. While previous reports suggested that Samsung wants to unveil the device in the U.S. in Apple’s backyard, today we hear that the location of the event is “top secret” for the time being.

Following the announcement event, the Galaxy S4 will hit stores in early April rather than mid-April, as a previous Sam Mobile report suggested. The new information seems to back up a recently leaked in-house contest that ends in early April at a New Zealand company. According to those leaked materials, the contest will have the Galaxy S4 as a prize for all winners, although it’s not known when these prizes will be actually awarded, especially since that particular region of the world is said to get the phone only later down the road.

The first markets to sell the handset will be “eastern countries from Europe,” will all of Europe and Asia set to get the Galaxy S4 by the end of April. The U.S., Australia and Africa will follow in May and June, although specific launch details are not available at this time for any region.

Moreover, Galaxy S4 accessories are planned for release in week 15 (April 8-14) of the year, again suggesting an early April release for the handset.

Press invites for this rumored March 15 Galaxy S4 event have not been sent out yet, and they’re expected to arrive in the mail after MWC 2013, which takes place in Barcelona, Spain, during February 25-28.

It should go without saying that, like previous Galaxy S4 rumors and reports before, this one is also unconfirmed, so keep holding on to that grain of salt, while we look for more Galaxy S4 details for you.