I have MTNL dolphin pre-paid connection. for the last few days i am facing a strange problem with my mobile in Uttam Nagar Area of New Delhi. when i dial or receive a call i hear my own voice, the other person who have called me also hears his own voice, i am unable to receive or sent any call from my mobile. I tried to check whether there is any problem with my mobile, i tried my phone in my work place at North Block, there it worked properly. what's the problem in Uttam Nagar area.
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