Sorry y'all, I haven't been on here in a while, and for some reason I haven't been getting any notifications! But I did want to update everyone, and hopefully it'll help. I was trying 3 different tanks and none of them would cause the 'old or new' popup, the coils were from .15-.17 and it would just keep reading .165ohms. I contacted the company I bought it from and they were going to exchange it for me, but it took me about a week and a half to get around to it. The day I was going to the post office I decided to check it out one last time, but this time I had a .25ohm coil, and as soon as I attached the tank, the 'new or old' screen came up, I clicked new and it worked just fine. So I went back to my original 3 tanks and tested those again and sure enough, it just kept reading the same thing for all 3. My guess is that if the resistance is very close, it doesn't bother trying to read it, Idk, it seems weird to me, but it is what it is I guess. I like the mod, I have 2 of them and they both do it, so I guess it's just a Smok thing, but the guy at the vape shop says if it's not burning through coils or causing any issues, it really isn't a big deal... We'll see!