Tata Docomo — international roaming not working

Address:700091

I am using tata docomo sim from last 10 years and last 3 years i am on international roaming inside us. Last time during dec 2018 when i was travelling to india the sim was working fine. After returning from india to us on jan 2019 i am unable to find any tata docomo signal on its partner network (T-mobile or at&t). Need urgent help.

My current location in us is ohio, dublin, 43016.
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I am Prabakaran [protected]. docomo not reply the unique porting code for the purpose of MNP.
My tata docomo no. [protected] numbar outgoing service Not working please help for this service star. my E-mail ID [protected]@gmail.com

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