Iphone 3GS - Sim wont activate
So i recently bought a Iphone 3GS off someone, they reset it all before they gave it to me, when i got it home i plugged it in to set it up etcetc.
I got to the part where i have to choose a language/country/location services/ and then wifi networks, once im connected with wifi,
it comes up with a new screen
''Activating your Iphone - It may take up to three minutes to activate your iPhone''
after a while of waiting it comes up with
''Could not activate iPhone - Your iPhone could not be activated because the activation server is termpoarily unavailable, Try connecting your iPhone to iTunes to activate it, or try again in a few mintutes''
I tried again and again and again, no luck, so then tried with itunes, nothing happened.. Besides it telling me that there was no sim card in the phone.
Also in the top left of the iphone it says no service..
please help!
iPhone 3GS