Only those who are fluent in English and have a vast experience in the field are able to offer Medical Transcription India services. I cannot imagine that somebody who is not qualified for the job would be able to perform well when it comes to Interview Transcription Services for example.
Quality transcription services such as Digital Sermon Transcription services can only be delivered if somebody is passionate about his job and knows what he is doing. In this industry, there is not time nor place for slacking. Only those who have the biggest expertise manage to survive and deliver the highest quality transcription services that their clients desire. I would only try such transcription services that comply with the HIPAA standards.