Dell Voice Accent round is an important part of the placement process whether it is for customer care voice based executives or technical support executives.

Customer care executives for the captive or international third party managed BPO centers earn nice pay packets these days.
To apply for the customer care executives, you need to have good voice accent for that particular country.
For applying for a UK position or USA position, you need to have English language voice accent for that particular country.
So in order to clear the telephone interview / voice accent testing round in the BPO / IT services companies MNCs, you need to have training at a good training academy before appearing for an interview.
The training period is usually of few weeks or months depending upon your progress and English language expertise. Such trainers also help you get placed in some reputed companies in India and abroad like Korea, Phillipines, etc.

Link: Some good training companies for voice accent training.

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