Pre-sale online orders will begin Oct. 10. The devices are expected to be in T-Mobile stores and other retailers Oct. 12.

The Amaze will be a T-Mobile exclusive. It features an 8-megapixel camera and a full HD 1080p camcorder, with an embedded video editor. It comes with a 4.3-in. touchscreen.

The Samsung Galaxy S II from T-Mobile.

Samsung said the Galaxy S II for T-Mobile has a 4.52-in. touchscreen, the largest of any sold by T-Mobile. Worldwide, Samsung has sold 10 million Galaxy S II smartphones, the company said, although there are some variations in the device across countries and carriers.

This Galaxy S II from T-Mobile offers even greater processing speed than the , which has 1.2 GHz dual-core processing.