unable to activate iphone 5s any solution

Hey ramakrishna1,

Thanks for using Apple Support Communities! I certainly understand how important it is to get your iPhone activated an working as expected. I am happy to get you pointed toward a resolution.

Thank you for sharing the screenshot of the alert you're seeing when trying to activate you device. Based on that alert, I recommend using the steps in the link below to resolve this.

If your can't activate your iPhone

If you work through all those steps and the issue persists please note under "Get more help" you may need to contact your carrier or restore your device using iTunes.

If you need to restore please follow the steps here: If your can't update or restore your iPhone, iPad, or iPod touch

Thanks again, and have a great day!