Contact T-Force using messenger on Facebook and request the info from them.
Tmobile logs all the imei numbers that you have used on your account and which one is active.
Will do, I'll try and report back if there is documentation they can generate. Hopefully they will be willing to release their logs.
Hopefully a screenshot will work.
Out of curiosity is the insurance tied to your phone number? If so you can go into
your settings for imei and your phone number is listed with it so maybe you can use a screenshot
1) After a bit of discussion, T-Force via facebook was able to confirm and provide me the log for the IMEI for my OnePlus 6 that's associated with my line. This should be sufficient documentation for insurance, but since this is just research and I don't actually need to process a claim, my hope will be that a screen shot of this sort of discussion with T-Force should be sufficient.
2) In response to gramps28 question of a screenshot with the IMEI: You actually make a great point - since the IMEI displays under phone number in the screenshot. The only problem I would see, particularly with Wells Fargo insurance, is that they probably would want to know (in an effort to reduce fraud) that your IMEI was associated with the phone number at the time of any incident. But I am just guessing there.
Anyway, thanks for the help and hopefully this helps someone else out in the future!