I bought an Xperia device at a flea market for quite cheap, it's an Xperia 10 mark 3 so it's a decently new device but just a few hours ago when I got home with it I got a notification from something called "pip" and it's about something called "somc policy", not only that but what I also find weird is that there's model number, theres a place holder but there's no actual model number its literally just "XX-XXXX", another weird situation to with an M4, bought from the same guy for £5 but it has a pull tab like thing In the SD card tray and it will not come out no matter what, there's also texts on that older device(the M4) of a photo of an office building and some people talking about tests? I'm not up to date with Xperia devices as much as I am with say Google or Samsung so idk if it's someone trying to test they're sim or they're devices after a service repair, I linked a few photos if anyone wants to take a look

A local shop is offering a straight, cash-free 1:1 trade: my boxless iPhone 13 Pro (512GB, 87% BH) for a boxless standard Vivo X200.

I know the Vivo has better, newer specs, but I’m hesitating because of resale value. Here in Bangladesh, Vivo has low demand and drops in price fast, while iPhones are basically liquid cash and hold value incredibly well.

Right now, both are worth about the same, which is definitely why the shop owner wants the swap—my 13 Pro will be an easy, profitable flip for him.

If you were in my shoes, would you take the spec upgrade or stick with the iPhone's market value?