Hello @TFay-10186 ,
Thank you for asking your question here in our community. I apologize for the delay in answering your question! To change the rate plan on your devices you will need to talk to your reseller. They will be able to update these plans for your 2 devices. If you need any help getting into contact with your reseller please let me know and I can message you their contact info.
Let us know if you have any other questions. we are here to help.
Have a great day!
Eishi FUN