IDTech UniMag 2 headphone jack card reader no longer working with iOS update

Hello brownsadaat,

Welcome to the Apple Support Communities, and I understand there are issues with card readers using the headphone jack. I'll do what I can to help.

Here are some suggestions if you're using just one specific device:

• Restart your iPhone
• Remove the software on the iPhone and add it back:

1. 1. Back up your iPhone: How to back up your iPhone, iPad, and iPod touch - Apple Support
   2. Restore the iPhone to factory settings using a computer: Restore your iPhone, iPad, or iPod to factory settings - Apple Support
   3. Set up the iPhone as new to test if the behavior still happens.

If it does happen when set up as new, reach out to the Apple Support team: Contact Apple Support

If it doesn't, try restoring your backup to see if it happens again: Restore your iPhone, iPad, or iPod touch from a backup - Apple Support

If you're using more than one device, try backing up then updating all devices to the latest version (13.3) and trying again: Update your iPhone, iPad, or iPod touch

Kind regards.