When I checked the my ein compatibility online it stated compatible but after I bought it the support team told me it was not compatible.
Response from simplemobile.comBy SIMPLE Mobile, August 20, 2020
Hi. This is April from SIMPLE Mobile. We are sorry for the trouble that you have encountered. Allow us to double check the compatibility of your device. Please copy this link http://bit.ly/2EETNDo and paste it on a new window for chat support. For your convenience, our representatives are available Monday-Sunday from 8:00 AM to 11:45 PM EST. You can also use our self-service menu by simply texting the word HELP to 611611.