If I factory reset a Samsung phone, if I sell it off, do I have to worry about my data being linked back to previously owning that phone? Or should I be in the clear, while no government agency is after me, would I be linkable back to the phone? (S21 Ultra Exynos) if model is relevant to answer
Technically IMEI could be linked to your pyhsical store purchase, at least if those are recorded
Eg. Warehouse A send Phone with IMEI X to Store B, Store B sells phone to buyer Y
But practically speaking you’ll be fine
absolutely not. I am using the S21+ snap version and the data will only be linked to the backup copy at Samsung Cloud
It probably wouldn’t hurt to run Extirpater after you reset it, to ensure none of your data is recoverable. You should be safe after that.