A photo of a leaked “Radio Shack Launch Checklist” has specified precise dates for the availability of three Android handsets that are also about to be launched on Verizon Wireless.

According to the photo, which was leaked by an anonymous tipster to Droid Life recently, the Samsung Stratosphere will be available by direct fill on RadioShack starting on October 6, and both the Samsung Illusion and the HTC Vigor on October 20.

Another document, also leaked to Droid Life much earlier, had suggested that the HTC Vigor will be released on Verizon Wireless on October 13 and will take on a different name as the HTC DROID Incredible HD (which seems plausible, since leaked photos of the HTC Vigor’s front and back show the device’s close similarity to the design of the HTC DROID Incredible.)

The said document described the HTC Vigor as “the world’s first HD smartphone” and listed the following as the HTC Vigor’s purported specs:

  • 4G LTE connectivity on Verizon
  • 4.3 WVGA display
  • HD resolution (1280×720)
  • 1.5-GHz dual-core processor
  • 1 GB of RAM
  • Android 2.3.4 Gingerbread
  • 8-megapixel primary camera with dual-LED flash and 1080p HD video capture
  • 1,620-mAh battery pack (with wireless inductive charging)
  • 2-megapixel secondary camera
  • Mobile Hotspot
  • 16 GB internal storage
  • 32 GB external storage (class 10 microSD card)
  • Beats Audio technology
  • Beats by Dr. Dre earbuds

Other reports, however, are suggesting a different name for the HTC Vigor when it is released on Verizon: the HTC Thunderbolt 2. A leaked Verizon schedule that we reported about last month mentioned that the HTC Vigor will be replacing the HTC Thunderbolt and pointed to October 5 as its release date.

Meanwhile, the Samsung Illusion (a mid-range 3G phone formerly codenamed the Samsung Viper) will reportedly replace the LG Vortex/Ally on Verizon Wireless, according to recent leaks. The previous leak of Verizon launch dates mentioned September 29 as its launch date, while the RadioShack checklist mentions an October 20 arrival on RadioShack. A recently spotted photo under Samsung Tomorrow’s account on Flickr showed what the phone looks like.

The Samsung Stratosphere (formerly the Samsung Aegis), a device with a slide-out full QWERTY keyboard, is also another Verizon-bound Android 2.3 Gingerbread smartphone sporting similar looks to the Samsung Epic 4G on Sprint. It was originally slated for concurrent launch with the Motorola DROID Bionic last September 8. Its first clear images only started surfacing just this month. Recent reports say that the Samsung Stratosphere will replace the Samsung Fascinate on Verizon. Assuming that the RadioShack checklist is authentic, the Samsung Stratosphere will most likely be launched much earlier on Verizon.

We should be able to gather more definitive word on the prices for these 3 Android smartphones as their release dates draw nearer.

For the meantime, which of these smartphones interests you?