Follow-up on the above: apparently the bolded/underlined doesn't apply as 'BYOD' when its a Sprint-branded version that they did sell directly (at some point) and you buy from someone else other than Sprint directly - and even Sprint reps don't understand the context differential.
I purchased a refurbished Sprint LG G7, made sure to underscore through chat support that it was a Sprint G7, just did not come with a SIM, and was sent the SIMOLW416Q SIM Part # as indicated in the listing in this thread as proper for a BYOD G7....which apparently turned out to be incompatible with the actual Sprint version G7 phone. All three of the sleeve label that the card comes in, the card with the SIM, and the SIM itself, shows the same ICCID # on it, but in actual activation attempt practice, it registered on Sprint's end as a completely different ICCID and showed an error on their end.
Online sales support is supposed to be shipping me a correct replacement now after a 4-hour/3-4 rep ordeal yesterday, but just wanted to post/underscore this for anyone else that might ever review this thread and be looking to go the same route to get a phone as I have. The funny thing is, I never had this kind of issue using the same approach with multiple refurbished G5's and ordering SIM's for those.