Bharat Sanchar Nigam [BSNL] — Roaming

Address:

600005

I have been a cellone post paid customer for over 12 years now with mobile no [protected]. I am paying hefty charges every month for roaming throughout india. Whenever i leave my home town chennai my 3g and internet is not working. Any amount of oral complaint has not helped. Cellone is telling me that the problem is with my phone. How is that it is working when i am in chennai? Moreover in delhi cellone has a tie up with another service provider called in dolphin. I was in delhi two days back and it was not working - internet. Although, my data roaming and wifi is on. Please help