Before turning on your Samsung phone for the first time, there are a few things you need to do. If your phone operates on GSM network, it requires a Subscriber Identity Module, or SIM, card to function. The phone will still power on without the card, but you will not be able to send or receive calls. You also have to install a battery and fully charge it before powering up the phone. Once all that is accomplished, the phone is ready to be turned on. Writer Bio
