1) You do NOT let the 112 call connect, if it does, the unlock process most likely will fail. So the whole "ethics of dialing 112" issue is non-sense.
2) I just recently understood why some people were having difficulties unlocking using Gevey SIM. 99% of them bought the fake Gevey. Yes, the fake Gevey works too, but the unlock process is sightly different.
I tried it myself, I needed to unlock a 2nd phone, I tried both the legit and fake Gevey SIM in a store here in Shanghai, if I use the fake SIM but follow the procedure for the real SIM, it fails 50% of time.
3) In China, the fake one goes for 30RMB which is about 5 USD, the real Gevey Pro goes for 100RMB which is 15 USD. So if you find a deal in USA for $10, believe me, it's fake, don't bother with it.
4) The difference between Gevey and Gevey Pro is minimal. Like someone said, Gevey Pro does not offer faster unlock process, it still requires unlocking every time the phone is powered off. The only difference is that you no longer need to trim the corner of the micro-SIM.