Downgrading With Custom Firmware?

[Mateo012]

so.. I have an iphone 3g (which is not mine) running on 4.0.1 and it is stuck at activation screen.

I figured to download a custom firmware 4.0 and restore with it (I have the SHSH blobs save at saurik) will I be able to shift + restore on itunes, and choose that file and actually downgrade it like that? Does the iPhone need to be in DFU? thanks

[nebo1ss]

You get the phone out of the Activation screen you need to activate the phone or Hactivate it. That means you need a SIM from the official carrier or a JB process which will hactivate the phone. Restoring to a different software is not going to solve your problem.

[Mateo012]

I've read in many places that you can restore with a hacktivated custom firmware then unlock

[nebo1ss]

I've read in many places that you can restore with a hacktivated custom firmware then unlock

Yes you can chose the Hactivation process while building the custom firmware. Like I said you need a jailbreak process that hactivates the phone a custom firmware which has hactivation checked is a jailbreak process which hactivates the phone. However, if you can get a SIM either on loan from a friend or a no longer active SIM from the original carrier you will be in a better position.

You will find hactivation kills the battery.