I bought a new iphone X from verizon.com in 2018. It's worked fine with no issues. This past weekend, I tried to trade-in the phone to verizon and found there was a "lost or stolen" flag on my IMEI number. Upon further investigation, it was by Sprint in 2019 (a year after I had been using the phone through verizon). Note - I have never had sprint. The phone was bought new from verizon.com. The flag occurred after I had already been using the phone. In talking with T-mobile, they are absolutely useless and refuse to take the IMEI off the black list even though I provided the original invoice and can provide monthly statements that show the phone was never through Sprint.