The UniMag family of audio jack readers communicate with the host device (phone or tablet) via the audio jack. The way this works is similar to a fax machine. In that, the card is read and the character stream is converted to an audio signal and is sent to the phone or tablet via the audio jack. An application written using ID TECH's audio jack SDK will "listen" to the audio and convert it back to characters by decoding the audio signal.
Virtually all Apple devices (iPhones, iPads) are compatible and should work without any additional configuration. Just make sure the audio is clear and unaltered. Turn the volume up (80 - 100%). Make sure it is set to stereo not mono. No equalizer, no base boost, no effects.
There is a umcfg.xml file. This file holds a set of settings that have been found to work for each device we have either tested ourselves or some from customers who report that they have discovered the settings profile that work of a specific model device.
If you are having trouble downloading the umcfg.xml file try holding down you alt key when you click to download.
You can search this file for your device's model number. If your device's model number is present in the file, you can test that it works by "reloading the XML" in the UniMag utility.
How do I find my Android device's model number?
Once you have a file with your devices model number in it, you should test it by using the "reloading the xml" feature in the UniMag Utility. If the testing is good (your able to see card data when you chose to swipe)
Once Tested good, you can provide the file to the application provider. They will need to rebuild their app with the new file.
Btw, if your tachnicle, you can copy the section of xml for a similar model and then change the model number to that of your device and test it. Similar models will often work with the same settings.