Wow this worked on my 1020! I joined the forum just to say thank you!
OP, please add MTS (Ukraine) SIM card to the list of known working SIM cards for this procedure.
I got a 1020 recently and SIM unlocked it. Everything (internet, text, SMS) worked fine after just putting my T-Mobile SIM card. Except internet sharing. I called T-Mobile to add internet sharing to my account, and checked on my T-Mobile branded 8x that internet sharing indeed works before trying this. But internet sharing still didn't work. Then I found this thread.
At first I tried with the few SIM cards that I had without success. I ordered Orange micro SIM but a coworker kindly lend me his MTS SIM from Ukraine, and the steps worked without fail!
Getting 19 Mbps down, 12 Mbps up through LTE in Seattle, WA right now!