It's an interesting development. Some call-centre jobs are coming back to the respective countries because many firms in India are now turning away first-level call-centre work. In many situations it's been presented by the companies as 'bringing support back home' but in reality, these days it's increasingly because the Indian call centre outsourcing companies are turning away basic call-centre work in favour of more advisory services (financial advice, insurance advice, second-line tech support, etc). They may have Indian accents which is compounded in unintelligibility by the occasionally bad phone lines, but the average call-centre worker in India is usually better educated than the equivalent worker in Europe or the US - so they're starting to take more advantage of that.
In the near future, you might end up talking to someone in Nebraka for first-line support, and when it's past their area of expertise, you might just get an Indian voice next on the line.
Nevertheless, Indian English speakers who're of a normal level can pronounce Vista to an understandable level just fine. Whoever came up with this piece of news is a moron.