What if my colleagues say they understand me but still ask me to repeat numbers?
Numbers, names and dates are the items most often misheard on calls because they carry no context to recover from. Test five of them in one sentence, note which come back wrong, and practise only those.
Numbers, names and dates are the most frequently misheard items in any second-language call, because they carry no context to recover from: if a listener misses a word in a sentence, the rest of the sentence usually repairs it, and a number has no rest of the sentence.
Test them deliberately. Put five numbers in one sentence you actually say at work, play it to one listener, and mark which ones came back wrong. Then practise only those five, in new sentences, a week later.
English Pronunciation for Indian Speakers: Fix What Listeners Mishear, Keep Your Accent →