If your phone says SOS ONLY or INVALID SIM or your iPhone is displaying a message saying "SIM Not Valid" (see below example) or your iPhone is asking to be connected to iTunes, then this means that your phone is not unlocked.
To unlock an iPhone requires you to have connected your iPhone to iTunes and to perform a full back up and restore of your iPhone. If you merely requested your iPhone be unlocked, but did not perform the full back up and restore in iTunes, then your iPhone remains network locked.
An example of the message displayed on an iPhone is shown below, and this message confirms that your phone is locked:
You will see that this message on your iPhone actually says "SIM Not Valid.... request that this iPhone be unlocked by your carrier."
Sorry, but there's nothing we can do to unlock your phone. Under no circumstances can we refund your purchase as it is your responsibility to ensure that your phone is network unlocked (this was already stated on our website, in the order confirmation email, on the card that came with your SIM Card and in the set-up instructions).
Please click here to read more information about unlocking your phone.