MY INFO GIVEN HERE IS WRONG AS 405 036 is TATA GSM's NETWORK ACTIVE OVER KOLKATA. READ HERE 405 036 is TATA GSM, not IDEA.
After Airtel, Vodafone, Reliance (CDMA), BSNL, Tata Indicom (CDMA), Reliance Smart (GSM), Aircel , Virgin Mobile and last one MTS India (CDMA) came to Kolkata as mobile operators one after another.
Now question is who is the next ? is it Idea Cellular or Unitech Wireless or Tata-DoCoMo GSM service? But it's sure that next one is not going to be a CDMA player, next will be a GSM player, for last 3 weeks if you search network manually on your GSM phone, you will find a new one IND 036 or 405 036.
INA 31/ 404 31 - Airtel
INA COMMAND / 404 30 - Vodafone /HUTCH
INA 81 - CELLONE
INA 91/ 404 91 - AIRCEL
INA 83/ 404 83 - RELIANCE (SMART GSM SERVICE)
Though Tata-DoCoMo has been launched, I guess this new one is Idea. B'coz Idea planned to be launched in Kolkata during Durga Puja Eve to get more attention from Kolkatans.
Unitech has no news on when it will roll out its service and Tata DoCoMo will be in Kolkata end of '09 or start of '10.
So Idea Cellular will be city's 6th GSM ........ hope to get more attractive offers from it!!