If you have unlocked your iPhone 3G or iPhone 3GS using ultrasn0w, but having troubles afterward, men behind iPhone Dev-Team have listed solutions for your unlocked iPhone using firmware 3.0 in Ultratips, here are the troubles you are probably having now with their solutions:

• Unusual battery depletion is almost always caused by people choosing to “Restore from backup” instead of “Setup as new iPhone” when iTunes asks you.  This isn’t caused by either the jailbreak or the unlock, but it’s a common 3.0 snafu. The fix is to just re-run the official 3.0 restore and choose “Setup as new” this time.  Your music and apps and all that will still be synced, but you’ll get rid of any conflicting wifi, bluetooth, or carrier settings.  Then just re-run redsn0w and install ultrasn0w.
• Remember, ultrasn0w works with hacktivated phones too, but don’t outsmart redsn0w into thinking you don’t need hacktivation! If you don’t plan on using an official sim, don’t activate via iTunes with such a sim.  Just keep your unofficial sim at all times and let redsn0w and ultrasn0w handle hacktivation
• T-Mobile in the USA doesn’t use the 3G frequencies that the iPhones support, so turn off 3G in Settings->General->Network.  (Some T-Mobile territories gracefully hand down to Edge mode, but most do not).
• Certain unofficial plans have limitations on whether you can make calls and use data at the same time. That’s not unlock-related.
• Some people have installed previous versions of ultrasn0w using non-standard techniques. While the ultrasn0w 0.9 update should have removed all previous versions of ultrasn0w, these users may have outsmarted our removal.  So make sure you don’t still see /usr/bin/ultrasn0w present if you’re at ultrasn0w 0.9 (which doesn’t have such a binary anymore).
• If you don’t need or plan to update to ultrasn0w 0.9 from a previous version, you can avoid having that red badge over Cydia by removing repo666 as a Cydia source.  Don’t worry, you can always add it back later  If you follow us on twitter you’ll be advised of any new updates anyway.

But Dev-Team has not added the solution to fix for Push Notification System on the jailbroken iPhone’s, but who knows they may come with ones in the near future, just wait and see. Therefore keep in touch with SEO Blog & Technology to receive the next news.

iPhone Dev Team has been doing a lot of great things to make its ultrasn0w as the best solution to unlock iPhone 3G 3.0 and 3GS 3.0, today Dev Team have launched ultrasn0w version 0.9 to get rid bugs reported on previous version. Ultrasn0w V 0.9 comes up with number of features:

• Works on both 3G and 3GS
• Works on hacktivated devices
• Works regardless of how you jailbroke your device
• Doesn’t patch any mach-o binary whatsoever. (Doesn’t require a separate patch as each new firmware comes out).
• Doesn’t install any additional daemon
• Has no race conditions, no popups about “Missing SIM”, no network issues
• Is almost 7000 times smaller than its nearest competition
• Is available now via Cydia. Source repo is http://repo666.ultrasn0w.com (that last “0” in ultrasn0w is a zero!)

To make a download of ultrasn0w, add this to Cydia http://repo666.ultrasn0w.com afterward install or upgrad ultrasn0W 0.9

Now you can unlock and jailbreak iPhone 3GS running on firmware 3.0 to make it work with any carrier:

Step 1: Now you need to download purplera1n for Windows and you must already have iTunes 8.2 installed.

Step 2: Run the purplera1n app. If you are on Vista, make sure you run it with “Windows XP Compatibility” mode by enabling it from the “Properties” tab.

Step 3: Make sure iTunes 8.2 is running.

Step 4: Click on “make it ra1n”:

Step 5: Let the app do its thing and wait for the phone to automatically reboot.

Step 6: You should now have “Freeze” in the list of applications. Run “Freeze”, download Cydia and let it install it.

Step 7: Finally reboot your iPhone 3GS. Voila! You should now have fully jailbroken and unlocked iPhone 3GS.

Download iTunes 8.2

Source:

http://www.redmondpie.com/how-to-unlock-and-jailbreak-iphone-3gs-on-windows/

Ultrasn0w 0.8 for iPhone 3GS users is eventually released by the infamous Dev-Team, with this iPhone 3GS users has ability to unlock iPhone 3GS to use it with any carrier SIM. So if you’re interested to unlock iPhone 3GS running iPhone OS firmware 3.0:

Step 1: Download iTunes 8.2.

Step 2: Launch iTunes. And then right clicking on iPhone name in the left side sidebar to backup your phone’s data and clik on backup

Step 3: Start redsn0w in order to jailbreaking your iPhone 3GS using redsn0w but firstly close iTunes. And follow the following steps to use redsn0w to jailbreak iPhone 3GS.

Step 4: Once you are done with the jailbreak, you can now unlock your iPhone 3GS running jailbroken firmware 3.0 by using ultrasn0w 0.8. To do this:

* Start “Cydia” on your iPhone 3GS.
* Touch on “Manage” tab on the bottom.
* Now touch on “Sources” as seen in the screenshot below:

* Touch on “Edit” and then on “Add”. You will be prompted to enter a url source as seen in the screenshot below. Type “http://repo666.ultrasn0w.com” and touch on “Add Source”.

* Cydia will now automatically update your sources by following a series of automated steps.

* After installation is completed. Search for “ultrasn0w” in Cydia and install this application (T-Mobile users should disable 3G before installing ultrasn0w). This app will automatically unlock your iPhone 3GS so that you can use it with any carrier.

Step 5: Now simply restart your iPhone 3GS. Voila! You are now running a fully unlocked and jailbroken iPhone firmware 3.0 on your iPhone 3GS.

If you want jailbreak iPhone 3GS with firmware 3.0 using Redsn0w 0.8. Now you can do it by using simple steps guide but you firstly must have updated or restored to the original iPhone OS Firmware 3.0 on your iPhone 3GS using iTunes 8.2 before make any move, after ward you can follow all the steps from the following link:

http://www.redmondpie.com/how-to-jailbreak-iphone-3gs-with-redsn0w/

Good luck!