Mine had a transparent sticker on both sides of the box. Maybe your seller was checking whether everything works to avoid returns and forgot to turn off. Dunno.
Don't know what was the deal but when I turned the phone on after charging, it did start like a new phone where you have to setup certain things. But there was one weird thing. After the phone was completely setup, I went to call history and saw that emergency no. 112 was already dialed in it that too thrice. This confirms that the phone was indeed checked for something before dispatching.
