For any of our members considering picking up the HTC One at full retail price in order to keep their current cell phone plan intact, you should pencil in/tap in April 19th on your calendars. HTC just announced the official launch date of their Developer Edition 64GB version of the HTC One. April 19th is the date and the price will be $649.99. Here's a quote with the full details,

An HTC spokesperson said, “The HTC One developer edition will be available for pre-order in the coming days through HTC and will be available for sale starting on April 19th.”

The HTC One Developer Edition will support all the 2G/3G/4G/LTE bands of AT&T, but it should also work on T-Mobile. When it comes to HSPA+ the device supports 850/1900/2100 MHz. T-Mobile mainly uses 1700 MHz for their HSPA+ network, but they have been refarming their network to support 1900 MHz in select cities. Sightings of T-Mobile’s 1900 MHz network can be found at Airportal.de.
Sound off if you will be considering this.

Source: AndroidandMe