Flipkart, an authorized MI retailer, has blamed MIUI by saying that even if it displays 7 or 9 hours charging time in MIUI, actual time may be much different, even an hour. They also adds that even if MI hardware check (*#*#6484#*#*) is failing, the device will not have problems; it is just issue with MI hardware check (*#*#6484#*#*) process and flipkart has apps much superior to find if there are actualy issues.

Whenever Flipkart conduct MI sales stock runs out in no time. Even the Flipkart site has crashed at times. However, worst of worst is that their software bug has allowed customer to buy Note 4 when there is no sale (and probably out of stock) and still they managed to deliver a, probably defective, device. Replacement request was raised on time and the issue was verified successfully by the representative.

I was a happy customer of Vodafone until few months back when I was a prepaid customer. Things were not the same after I migrated to postpaid. I think Vodafone really panicked when Jio came in and did many things, which their systems not customer service never understood. 

Indian state-owned telecommunications company Bharat Sanchar Nigam Limited (BSNL) is the largest provider of fixed telephony and broadband services with more than 60% market share in India, according to wikipedia. However, in recent years there has been intense competition in the Indian telecommunications sector.