I was using Loop Mobile network earlier, since they have now discontinued their service I opted to switch to Tata DoCoMo.
I chosed this network because of its cheap call rates and internet plan rates. But, now I am really repenting on the choice that I made. I am facing a lot of network issues. Many of my friends and family members have complained that they most of the times when they call me they are informed that my phone is out of coverage area. Apart from this whenever I receive some calls I have to rush to the window of my home to talk otherwise the caller cannot hear me. Moreover the internet plan also does not work well I cannnot download any pictures received via whatsapp, thankfully I receive my messages.
Worst network ever!