Interesting that you brought this up...this was my 6mo plan once i payoff my Turbo2 with Verizon.
You can test this with ST's website. I will test with my Turbo 2 this and report back.
Also, there is NO reason why it would not work...my Turbo1 works on ST, so the Turbo2 should work as well.
All Verizon phones are unlocked for any carrier.
I ordered a ST Verizon SIM Kit with their new 10GB $55 plan to use with my Turbo1.
When I get it, I will test on my Turbo2 to make sure it works.
Again, once I get the Turbo2 paid off (only $324 to pay) and my test works, I possibly will port my regular number to ST...depending on whether Verizon Message+ works on ST. I am hoping it will, since I will be on the Verizon network just using ST.