TinyUmbrella to Protect Baseband Upgrade on iOS 4.1 iPhone 4 & iPod Touch 4G

Notcom has now updated TinyUmbrella which provides baseband protection for your iPhone 4 or iPod Touch 4G on iOS 4.1. Previously, while upgrading to latest firmware on new baseband, it wasn’t possible to downgrade the baseband regardless of firmware downgrade. But now, you can downgrade baseband as well, till Apple signs iOS 4.0.2 firmware. For example, if you update your iPhone 4 to iOS 4.1, your baseband will be updated to 2.10.4 and when you downgrade it to iOS 4.0.2 your baseband will be downgraded to 1.59.00 which wasn’t possible before.

Baseband Protection – Updating to 4.1 using TinyUmbrella will protect your baseband from update.THIS ONLY APPLIES TO IPHONE 4!!!!! If you have a 3G or 3GS and you update to 4.1 your baseband will likely be updated.

SHSH Retrieval from Cydia – If you don’t have your SHSH locally, TinyUmbrella will request them from Cydia on-demand; allowing the restore to continue

Automatically point hosts to Cydia – Once you close TinyUmbrella, it points your hosts file to Cydia (for further baseband protection and update/restores without TinyUmbrella)

Download TinyUmbrealla for iPhone 4 and iPod Touch 4G

• TinyUmbrella for Windows
• TinyUmbrella Mac
• TinyUmbrella for Linux

On iOS 4.1, you will surely lose your jailbreak on your iPhone and iPod Touch, and being latest firmware you might face incompatibility issues with your favorite iPhone apps forcing you to return to old iOS 4.0.1 firmware. If for any reason, you upgraded it to iOS 4.1 and would go back to 4.0.1 or iOS 4.0.2, then follow the steps (posted here). Once Downgraded, you can jailbreak and carrier unlock (all baseband) you iPhone 4 and iPod Touch 4G using following guides:

• Jailbreak iOS 4.0.1 iPhone 3G with Redsn0w 0.9.5
• Jailbreak iPod Touch on iOS 4.0 / 4.0.1 using JailbreakMe
• Jailbreak iOS 4.0.2 iPhone 3G, iPod Touch 2G with Redsn0w 0.9.5
• Unlock iPhone 4 iOS 4.0.1 with Ultrasn0w