Mobile Phone Service Providers In India

1. BSNL (State-owned) 
https://www.bsnl.co.in/

2. Jio (Reliance Industries) 

https://www.jio.com/

3. Airtel 
https://www.airtel.in/

4. Vodafone - Idea 
https://www.myvi.in/

5. MTNL (State-owned) 
http://mtnldelhi.in/
http://mtnlmumbai.in/

6. Aircel 
http://www.aircel.com

7. TataDoCoMo 
http://www.tatadocomo.com/

8. Telenor (Telenor Group) 
https://www.telenor.in/

9. MTS (RAINBOW) 
http://www.mtsindia.in/

10. Reliance Communications (Reliance ADAG)
http://www.rcom.co.in

11.  TATA INDICOM ( Tata Teleservices Ltd)  (DELHI only)
http://www.tataindicom.com/

12.  T24Mobile ( Tata Teleservices Limited (TTSL) & Future Group)
http://www.t24mobile.com/

13.  VIDEOCON  (Videocon Telecom,  HFCL Infotel Ltd) (Discontinued)
http://www.videocontelecom.com/

14. S Tel: 
http://www.stel.in/

15.  VIRGIN MOBILE ( TTSL, Virgin Mobile India Limited)  (Merged with Tata Docomo)
GSM, CDMA
http://www.virginmobile.in/

16. HFCL Connect; PING MOBILE
http://pingmobile.in/index.html

17. SPICE TELECOM ( SPICE COMMUNICATIONS LTD)  (Taken over by Idea Cellular)
http://www.spiceindia.com/spice/home.asp

18. Loop Mobile (BPL MOBILE) (Taken over by Bharti Airtel Limited)
http://www.loopmobile.in/

19. ETISALAT DB TELECOM (Swan Telecom Pvt Ltd), (Allianz Infratel): 
http://cheersmobile.in/

Note: Some telecom companies affected by cancellation of licenses under 2G Spectrum Scam,  Please refer
http://en.wikipedia.org/wiki/2G_spectrum_scam

For Latest updates Visit:
https://en.wikipedia.org/wiki/List_of_telecom_companies_in_India