From a few minutes of research from a past post of yours, proxy providers are very hard to find there.
I would say to buy the MP post and repost module if you haven't. Here's the thing (this is all my own belief and opinion)....
In Hong Kong/Singapore, internet censorship is commonplace (from what I've read), and with the new net neutrality regulations and ISP's in the U.S. being able to sell your browsing history, I am sure the use of proxies/VPN's is only going to go up.
What does that mean for you?
Locate a service that has both a proxy and VPN that use the same IP (you are level 3 now are you not?). Use the MP post repost module and verify using your local SIM. I would create a few test accounts to try the theory, however, here's an additional measure I would use.
When the initial, "Was that you" PV comes in, screen shot it on your phone. Use the VPN for browsing/ comments on your (hopefully) android phone, and post only through MP.
If you have to verify, then you can say, hey, this was me, not the first time I've received this. Send them the first screenshot.
I said it in another post, but now, many of my test accounts PREFER being on MP and not on an app!
I have logged in to many of them from all over, desktop, phone new SIM etc and they are still active!
Try it out, report back. Best of luck!