Help required to restore my old 1st generation iPhone

[fiberwalker]

I got this old US purchased 1st generation iPhone 8GB which I simply failed to get it restore through using iTunes. I have followed what is advise on Youtube whereby you can virtually get anything but not mine to works. It keeps locking out the phone & allows only the emergency calls. I wonder does it relate to it's original location whereby the telco provider sim lock or etc and I would have to need to use a US SIM card inserted in order to get it rectify? Any ideas? I can still use it as a simple call and answer hand-set but cannot goes into its IOS if I insert any working SIM card. Thanks

 

[Gregoris]

It might be worth using redsn0w to jailbreak and unlock it...

 

[fiberwalker]

I got this old US purchased 1st generation iPhone 8GB which I simply failed to get it restore through using iTunes. I have followed what is advise on Youtube whereby you can virtually get anything but not mine to works. It keeps locking out the phone & allows only the emergency calls. I wonder does it relate to it's original location whereby the telco provider sim lock or etc and I would have to need to use a US SIM card inserted in order to get it rectify? Any ideas? I can still use it as a simple call and answer hand-set but cannot goes into its IOS if I insert any working SIM card. Thanks

How do I go about doing this as suggested? Thanks