Q: Issue checking update

Hi deepakjagyasi,

Welcome to the Apple Support Communities. I'm sorry to hear that you are having these issues with your iPhone. I'm a bit unclear on exactly what you are seeing or describing (for example, the error message or error number), but if you are having issues with updating either iOS or apps on your iPhone, you may find the troubleshooting steps outlined in the following articles helpful:

Get help with iOS update and restore errors - Apple Support

iTunes: Possible iTunes Store errors - Apple Support

Regards