International roaming / India - has issues

I upgraded my T-Mobile plan to Magenta Max hoping to not have the connectivity issues I had on my earlier trips to India (Hyderabad, Pune, Chennai and Delhi). 

I just returned after spending 11 days in Hyderabad. I literally had no connectivity for 95% of my time though I was staying in the heart of the High tech City. As soon as I left Westin Hotel in the High tech City, I would see zero bars on my phone. Sometimes, I will see 3 or 4 bars but no connectivity. Outside the high tech city, I always had 0 bars on my phone. Basically I couldn't use my phone in Hyderabad without a wi-fi connection. I felt like I was living in the stone age with T-Mobile. Not sure, why I am paying T-Mobile for the Magenta Max plan for connectivity in India - I had connectivity in Delhi most times but none in Hyderabad.

I must say that T-Mobile continues to majorly disappoint its subscriber for connectivity in India. I had terrible experience on my prior trips and I thought it was due to not buying their international pass. On my previous trip, I bought the pass and had the same issue.

T-Mobile talks big about high quality and customer care but it seems that they are aware of this problem (this thread and many such threads) and have decided to do nothing about it. I would probably be switching to ATT or Verizon after my contract (new phone payments) are done.  I travel to India a lot and seamless connectivity across India is critical for me.

I am glad that I didn’t waste hours with t-mobile support based on the experience of the folks on this thread. 

Highly disappointed T-mobile.