Upgrading at 50% Device Pay-Off

Hello!  So I am submitting this question here to hopefully avoid the fiasco I went through previously when I upgraded at 50% device pay-off.  On Friday, I am going to submit the payment to pay off half of my current device.  I am then going to go to the store to return this device, and add a new one to my line.  Note - I do have the equipment insurance on my device.

Previously (early April 2019) I did this exact process, and ran into a strange issue on Xfinity's end where I could not upgrade, despite having met all of the requirements.  I do not want to go through this headache again.  

Can a representative please take a look at my account and confirm for me that I will not run into this issue again? 

Thank you.