What are the specific model numbers of the iPhone models you are selling, not with just the model 8 plus but with ALL of them? As I recall in my research the last time I got an iPhone a few years back, the different model numbers may work on your carrier, but not necessarily as a 4G OR LTE phone in that area/country.
I don’t think anyone will be happy having their LTE phone only working as a 2G or 3G phone. I know I wouldn’t.
Respect your customers and be transparent. No one should have to ask ‘what’s the model number of the phone you are selling?’ It should be in the listing. Please correct this omission on all the iPhones you’re selling.
Thank you for your time, respect, AND ETHICS!