This is the release date for T-Mobile customers. July 10th for everyone else. Here is the details directly from T-mobile:
Exclusive offer for T-Mobile customers: Get your SidekickÂ® 3 first starting 6/28!
As a valued T-Mobile customer, you get the exclusive opportunity to buy the new Sidekick 3 before it officially hits the streets!
* Already a T-Mobile Sidekick customer? Log in now to upgrade online beginning 6/28.
* Already a T-Mobile customer, but donâ€™t use a Sidekick? Call Customer Care at
1-800-937-8997 or 611 from your handset to upgrade beginning 6/28.
* Not yet a T-Mobile customer? Sidekick 3 will be available for sale online and in
T-Mobile stores on 7/10.
You can also demo the new unit at Sidekick.com