Update : The latest version of Redsn0w (Windows) can enable that tricky DFU mode on Windows! Macs can use the Pwnage tool to create the custom firmware itself…
Warning : This isn’t for the faint of heart. I did not post a detailed writeup cos’ DFU mode is kinda tricky on this one. If you know what this is and what it means, go ahead and try this. All others, please wait while other Windows users verify this.

The links are all interchangeable and you have all the mirrors you can ever think …

Apple just released iOS 4.1 update, not a super important update for 3GS users (unless you are into GameCenter!). iPhone 4 users can finally relax given that iOS 4.1 comes packaged with a fix for those nasty sensor issues.

Before you do any thing, please quit iTunes and do the following. TinyUmbrella is what you need to save your iPhone from Apple’s anti-jailbreak updates.
Download TinyUmbrella for your Mac/Windows/Linux.
Install/Launch TinyUmbrella and save SHSH blobs for iOS 4.0.2 for 3GS, iPhone 4 from Apple (or Cydia after the SHSH blob signing period by …

iPhone 4 was recently jailbroken and now it is unlocked too, thanks to the Dev Team. It cannot be easier, no PC/Mac required, only the internets!
All you need are the following :

A Jailbroken iPhone 4 / 3GS,3G (it should be activated, that is a pre-req for online jailbreak)
A WiFi connection
That is pretty much it!

Step by step (best practices) :

Launch Cydia and search for ultrasn0w [if not found, then add repo : repo666.ultrasn0w.com in Cydia]
Install ultrasn0w and reboot your iPhone 4 when prompted. Turn 3G off  (Settings -> Network -> Enable …

For a list of important Cydia apps and more screenshots, go here. Visit this page if you have an iPhone 4.
There is not much to write about this time around (no PC or Mac limitation)! Jailbreaking is perfectly legal btw!
All you have to do is :
– Make sure your iPhone is activated. It is not possible without a valid iPhone SIM. If you don’t have one, we must wait until another tool is released.
– Make sure you sync your iPhone to iTunes. This is important, just in case you know!
– …

CAUTION : iOS 4 jailbreak is way complicated unlike other jailbreaks. Please proceed with caution.
Requirements :

Jailbroken iPhone 3GS with older bootrom.
You haven’t used Spirit jailbreak before (for untethered jailbreak).
You have Windows (PC). For Mac, try Pwnage instead.
Please read the above requirements again.

More info about these custom firmware files :

[UPDATE] : You need to download files from either step 1a or 1b depending on your baseband preference. Both are unlockable, so I would go with step 1b which is the latest baseband which supposedly does better with the battery. step 1b …

It is evident that iPhone 4G is going to hit the scene this June. After Gizmodo’s leak and supposedly poor iPhone sales ever since, Apple decided to lower the price of the 3GS iPhone. It is available @ Walmart (Brick and Mortar stores only btw) starting 25th May, 2010. This may be the only chance to nab an iPhone 3GS with normal ETF of $175 (if you wish to cancel in the future).

Why a $100 price-cut on the most powerful iPhone ever?
Well, Gizmodo’s iPhone 4G leak supposedly weakened all iPhone …

Geohot failed to release it, but comex did. Here is the full guide.
Geohot did it again, this time with a nice video-proof. Apple’s heightened security with the latest bootrom in ipt2,3 and 3GS iPhones forced many to resort to tethered jailbreak which can be a pain when your iPhone decides to reboot on the go. A blackra1n like app should soon see the light of day for total freedom to all Apple mobile gadgets! Till then, check geohot’s post.

CAUTION CAUTION CAUTION CAUTION : Please leave a comment if you don’t know what you are doing. Better safe than sorry. You are warned, now proceed!
iPhone 2G, 3G, 3GS users can now safely update to 3.1.3 firmware without updating the baseband (for unlock). If you are not the one to download all the various files and just want the ultimate result, these files are waiting for you to download! If you rather want to start from scratch, download Pwnage 3.1.5 tool for Mac.

Caution #1 : A restore is going to wipe the …

Apple tightened security with iPhone 3GS and the latest 3GS hardware version is only capable of tethered jailbreak 🙁
Saurik, the man behind Cydia implemented a clever approach to bypass Apple’s insane security features of the 3GS! He explains the whole process in great detail here.
In short, all you have to do is :
Jailbreak your iPhone 3GS. Trust me it is easy, fun and super productive to jailbreak your iPhone and it is perfectly legal!
Launch Cydia on your iPhone 3GS
Click on ‘Make my life easier, thanks!’. If you don’t see it …

The BEST deal for an iPhone 3GS so far!

Activation FEE waived!
FREE Overnight Shipping!
$49 for iPhone 3GS 16GB / $149 for iPhone 3GS 32GB!
$42 extra dollars for you to save when you click this link, search for ATT and then click on that link to purchase the 3GS refurb iPhone! Simple! Act fast before it is too late!
Best part being jailbreak ability without needing to tether jailbreak cos’ they are refurbs…!