Have unlocked/jailbroken 3GS 4.0.1 options for upgrade?

[Cottonsworth]

My dad decided he wants to give the iPhone a try. I'm giving him my old 3GS which I haven't used in about two years.

It is jailbroken and unlocked and running iOS 4.0.1. Unfortunately, most apps from Apple's App Store requires the phone to be at iOS 4.1.

Is there a way to upgrade from 4.0.1 to 4.1 and keep the phone Jailbroken and unlocked? Any suggestions? Thanks!

 

[dhlizard]

Apple still signs 4.1 for 3GS.
If you need to unlock, be careful to preserve baseband by using a No_BB IPSW.
iClarified.com has tutorials

 

[Cottonsworth]

Thanks for the response. Do you recommend he upgrades to 4.1 or something higher?

He mainly wants to access the Apple App Store and have an unlocked device.

 

[sbddude]

If you preserve baseband, you can upgrade it all the way up to 5.1.1 and jailbreak that. That will maximize compatibility with app store apps.

 

[dhlizard]

Thanks for the response. Do you recommend he upgrades to 4.1 or something higher?

He mainly wants to access the Apple App Store and have an unlocked device.

You specifically asked about 4.1
But 5.1.1 is a great option