Well every customer may have different experience with each operators.
My Experience so far with RCOM is Good across 3 numbers( 1GSM, 1 CDMA- Postpaid now moved to 4G, 1CDMA Prepaid - now closed as I am not in country for migration) for around 10 years now.
Experience with all telcos so far
Docomo Prepaid:- Pathetic network. Internet used to auto disconnect after 40 mins. Black spots in my office. never faced unwanted deduction
Airtel Corporate Postpaid:- Excellent Coverage, Had billing issues. Never refunded my 500Rs Deposit. customer care average
Idea Corporate Postpaid:- Excellent Coverage. had issue with voice. forcing me to stand in balcony at home to talk else i wont hear other person in-spite of full network. Multiple complains never fixed the issue
Vodafone Prepaid:- Used this as my secondary number along with RCOM CDMA. Secondary Number just for whatsapp and International Roaming. As I never invested in CDMA smart phone and RCOM does not give International roaming on Prepaid. Excellent Coverage. ok customer care. couple of times faced unwanted deduction. Never bothered to raised complain.
RCOM Postpaid:- Used by my family member primary for call 1200-1800 Mins, Plans I felt always better than AVOID. never faced unwanted deductions.SIM Replacement easy. Ok customer care. Plan change always done over the call or via Chat. Moved to 4G plan was retained. 10GB benefit provided but data is not used. 4G coverage is also good at home/Office/roaming cities till now. Using Free Roaming since last 2 years for just 349 Plan with 750 Mins. Now requested to move to 499 Unlimited plan
RCOM Prepaid:- Couple of times unwanted deduction. always refunded after dropping mail. Easy SIM replacement. RCOM store charged me Rs100. but it was refunded after i complain over the email. Used many offers like Rs180 for 18000 Messages/6 months, Rs 48 Life time 50P, Smart Data recharge like 292, 92 which used to give data for 6/3 months for people who requires less data. Roam like Home acorss India etc all this was at a time when no other operator even come close to this offers. one of the Prepaid number is still at 1Rs/3 Min plan (no rate cutters). Other Prepaid is closed now.Full recharge for amount as low as Rs60.
Overall RCOM Experience:- Yes. I have to live with 2 CDMA basic phones + 2 CDMA spare phones which are waste. Had to invest in GSM phone. But in terms of service I am satisfied for what i have been getting vs other operator experience vs what I pay for.
With so many operators and nationwide MNP everyone is free to switch operators rather than cribbing against particular operators