If you are in India you probably hear the phrase ‘Tell me’ many times a week from someone who just answered your call. The phone conversation goes something like this. ‘Hi, this is Basab.’ The other guy says ‘Oh hi Basab. Tell me.’
‘Tell me’ is a literal translation of ‘Bolo’ in Hindi or something equivalent in other Indian languages. This is a uniquely Indian phrase. Good English would require ‘Tell me’ to have an object at the end of it. Like ‘Tell me why’ or ‘Tell me something’.