In Phone 3G Is Not Working Only 2G Network Is Workiing Iphone 4S

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iphone when i activate 3g data on phone network is not open only 2g netwwork is working

Your carrier might have dropped 3G and 4G bands in favor of LTE. I know T-Mobile did a while ago.

Try settings –> General –> Reset –> Reset Network Settings settings –> General –> Reset –> Reset Settings

Hello Nekhil, What is the model number of your phone? All Apple devices have an ‘A’ Number on the back. Example: I have an A1549 iPhone 6. The back of my phone says “A1549.” What country are you using the phone in now? What is the name of the carrier (company) you use now?