I think the king here is the URL
http://www.boltaconsumer.com/complaints/zong-sim-block#comments11
That directly contains the word
Zong
Sim
Block
- the reputation of the site
http://www.boltaconsumer.com is probably good with Google. Genuine traffic across different parts of the country, no spams, the word complaints in URL may also contribute to its high ratings. But I believe it is the URL that is doing the trick.
I saw that it wasn't the only link that was pulled from this site. There were others too which contain sim-block in the URL. That again shows this site has good ratings with Google and the URL does the rest of the trick, although there is nothing in that URL. Hmm there is one thing, the URL contains the exact same problem that you have and it landed you in perfect spot!
Experiment
Now lets say you find solution to this problem and start a blog about it. The chances are your solution will not appear anywhere near the top because your site probably does not have the reputation.