As a side benefit, he has probably totally unlocked your T-Tab now. It will most likely work with any SIM now. Telstra normally charge a $100 fee for this service, so you have done really well. Congratz.
I bought a Huawei S7 while in AU on a recent work trip, after the shop people assuring me it work here in NZ on the XT network, (same as Next G)
Guess what, doesn't work its locked to Telstra rang them but they where no help over the phone, and Huawei AU don't want to know either.