I don’t know from yesterday night I cannot download any new apps as soon as i try to download they ask for verification and further I continue with process after signing in with apple id password they show a failure.
iPhone 6s, iOS 13
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.
If necessary
Do a backup and try a factory reset. Then restore from your backup.
Backup - Restore your device from an iCloud or iTunes backup.
Verification failure
