Here's my question. So if I were to buy a brand-new smartphone from a site like Ebay, would I be able to turn it out and use it straight out of the box as a WiFi only device without ever inserting a SIM? And would I be able to skip the activation, and not require internet to use it out of the box? Please reply soon. Thanks.
I just tried this on my S5 and yes if you don't have a sim in you can still connect to WIFI and surf the internet and otherwise use the phone like normal. You just obviously don't have your mobile connection and you cannot make phone calls using "wifi calling" as that still needs to be tied to your provider (skype would probably work though).