My iphone 3gs was purchased in us and is being used in New Delhi, India. The problem was that when i was calling anyone the the other person could not listen to my voice properly. I restored my phone to factory setting as a new phone. Now the problem is even bigger. Now it is not connecting to cellular network.When i click manua option in cellular network it says NO SERVICE and when i click auto option it keeps on searching for network and finally says unable to load network list. I am using vodafone sim card.
Please guide me the resolution to my problem.
iPhone 3GS, iOS 6.1.2, purchased in us and is used India