I’m trying to update my apps from apple store then it’s not updating and it’s asking Signin to ITunes. So when I’m trying to enter Apple ID it’s showing failed to login. I’m unable to update my app please help me

Can you sign in other places using that Apple ID and password? If so, some things you can try. Do you have access to another WiFi network where you can try? That has worked for several people.

Try a restart.

Restart your iPhone, iPad, or iPod touch    *

Try a forced restart. See the section towards the end of the article.

Reset Device. -

If necessary

Hard reset.     -

Do a backup and try a factory reset. Then restore from the backup.

Restore to Factory setting.      *

Restore - If you see an error when you update or restore your iPhone, iPad, or iPod.   *

Backup - Restore your device from an iCloud or iTunes backup.     *