Internet problem after updates

Hi all genius brains, i am using Yureka since last one year. Recently after updating the OS I am experiencing the internet issues with my Sim 1 of Vodafone. It works great on other phone same SIM. But in Yureka I need to manually activate the data connection at every use. It works great for a minute or two and then again the data connection goes off automatically. Then again switch on the data connection manually and so on.

I have replaced my handset already from the company for this problem. But with the replaced handset also the same problem once the system got updated.

Pls help.

Thanks,
Om

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