In 2010 I met a person from India who pronounced it "C pound", and they were as confused by my reaction as I was by their pronunciation. I guess somehow that pronunciation became popular enough that it acquired momentum and everyone in their circle (or maybe all of India?) assumed it was correct. The # key on the phone is called the "pound key" in India, which is where it would've started from, and I guess they never heard any foreigner Youtube video etc pronouncing it.
I don't know if they still pronounce it that way or not.
I don't know if they still pronounce it that way or not.