A leaked internal document from Staples reveals AT&T may have plans to roll out Samsung's Galaxy 4S smartphone on April 26. Verizon, meanwhile, will debut the phone on May 30th, while T-Mobile will release its phone on May 1. 

You can see the leaked document on Boy Genius Report, but note the release dates are bold and marked "tentative" so nothing is quite set in stone. 

[via Boy Genius Report]