iPhone 5S, iPhone 5C release date on September 20 apparently confirmed by T-Mobile employee blackout

Photo Credit: Sonny Dickson

According to TmoNews the mobile carrier has prohibited its employees from taking time off during the weekend of September 20 to 22.

Generally, one of the signs that can confirm or deny a date could be that there is a ban on taking time off for Apple employees or its partners.

Last year Verizon and AT&T announced vacation blackouts on September 21, the same day the iPhone 5 hit the market in nine countries.

The iPhone 5S will be an upgraded version of its predecessor, while the iPhone 5C will be aimed at emerging markets.