This is quite simple. If you did a jailbreak on your iPhone you need to change the default password. Why? Because hackers can access your phone, read your mail, sms, download other data. The second reason is because there are already several viruses (worms) that use these default passwords.

Here’s a quick step-by-step tutorial.

1. If you don’t have MobileTerminal application installed: run Cydia, search for MobileTerminal and install.
2. Run MobileTerminal.
3. Type passwd and press return.
4. Enter the default user password alpine and press return.
5. Enter a new password and press return.
6. Enter a new password again and press return.
7. Congratulations, you changed it for default mobile user. Let’s do the same for root user.
8. Login as root user: type su root and press return.
9. Type alpine for password
10. Type passwd and press return.
11. Enter a new password and press return.
12. Enter a new password again and press return.
13. That’s it!

The passwords are now changed, and your jailbroken iPhone or iPod Touch is now a bit more secure than it was before and less vulnerable to the worm detected recently.

Here is a quick video tutorial, how to enable cool Emoji Icons for free and without the need to jailbreak the iPhone or iPod Touch.

Here is a step-by-step tutorial:

1. First start Cydia and search for “iphone-notes”. Install this repository and return to the tab “Search”.

2. Now look for “tethering 3G – 3.1.2″ or “tethering 3GS – 3.1.2″ depending on the model of your device and install the package.

3. Restart the iPhone and then connect to the site www.unlockit.co.nz directly on the iPhone to create a custom APN. Create and install the profile.

After you restart you should see the field “Tethering” in the Settings.

via ispazio

Good news is that you can still use redsn0w 0.8 to jailbreak firmware 3.0.1. Here’s the step-by-step plan:

1. Download both firmware 3.0 and firmware 3.0.1 (link).
2. Download redsn0w 0.8 (link).
3. Update or restore to official 3.0.1 in iTunes.
4. Run redsn0w.
5. When redsn0w asks you to identify the IPSW used, point it at the 3.0 IPSW instead of the 3.0.1 one.
6. Follow the instructions.
7. After the jailbreak, reinstall ultrasn0w 0.9 if you need the unlock.

via cnet

via cnet

Cydia store packages are going to be in blue writing. when you click on one, your install button says “purchase” instead of “install”.

The Cydia store uses two layers of authentication: 1) Authentication 2) Payment. Currently, amazon is used for payments and you can use either facebook or google for authentication. If you have an existing amazon account, facebook account, or google account, this is easy.

You can choose to have this automatically remembered so you don’t have to go through these steps again if you want. Also you now need to link the device you’re using to your account:

After this is done, you now need to setup payment. There are steps to take on teh very first time, but if you allow it to be kept, it will be remembered for the second purchase. Note you can also set pay limit for one-click installs without having to reenter a password in the future:

After, sign in with your Amazon password and finish checkout:

After this, you hit the “close” button and wait. It took about 20 seconds for me. Now the package shows that it’s purchased and ready for download:

After this, updates and such are treated normally. If you selected the correct options, it will be very easy to purchase the next item.

UPDATE: you can use paypal now

via thebigboss

Along with iPhone there is support for BlackBerrys and Windows Mobile.

Here’s a video:

Read more info here.

Note: In order to create an account without a credit card, you must make sure you are in the App Store, not the iTunes Store.

1. Pick your country from the pop-up menu at the bottom of the iTunes Store homepage.
2. If your country also has an iTunes Store, you’ll need to navigate to the App Store by clicking on the “App Store” link from the menu on the left.  If not, proceed to step 3.
   
   
3. Important: Before proceeding to the next step you must purchase a free application by clicking ‘Get App’.
   
4. Click create new account.
   
5. Click Continue.
6. You’ll need to read and agree to the iTunes terms and conditions, make sure you check the box next to where it says “I have read and agree to the iTunes Terms and Conditions.” Click Continue.
7. Enter in your email address, create your password, continue to create and answer your security question, then enter your birthday. Click Continue.
8. Select None as the payment option.
   
9. Continue to fill out the required name and address fields.
10. You’ll then see a screen that says ‘Verify your Account’. Click Done and then check your email for a verification email from “iTunes Store.”
11. Open the mail, and click on the phobos link enclosed in the email to activate your account.
    
12. Once you click on the link, iTunes should then prompt you to sign in with your account name and password.
13. You’ll then see a “Congratulations” screen. Click Done to be taken to the App Store home page.
    

via support.apple.com

Dev Team finally made it. They created software called yellowsn0w, that unlocked iPhone 3G. Now you can use any carrier you want. I successfully unlocked my US version.It works much more stable than sim proxy method.

Please, back up everything on your iPhone before you start, just in case. Everything you do is your responsibility. I had to go through all 4 steps to make my iPhone 3G work. I used only my new sim without sim proxy.

Here are the steps:

Step 1: Restore your iPhone to version 2.2 (Not needed if you are already at 2.2 with baseband 02.28.00):

1. Download 2.2 firmware
2. Run iTunes
3. In iTunes click on Restore button holdong the Shift key on your keyboard.
4. Choose downloaded firmware 2.2 image and wait.

Step 2: Jailbreak your iPhone using this tutorial.

Step 3: Install yellowsn0w:

1. Load up Cydia and add the yellowsn0w repository: in Cydia click Manage – Sources – Edit – Add. Than type http://apt9.yellowsn0w.com. You can also use Installer instead of Cydia, the repo is http://i.yellowsn0w.com
2. Install software called yellowsn0w
3. Reboot the phone and you should have signal.

Step 4: If you still do not have signal

1. Try turning on and off airplane mode.
2. Install BossPrefs
3. Install BossPrefs Yellowsn0w Toggle
4. Reboot
5. Run BossPrefs and make sure yellowsn0w toggle is on. If it is on and you do not have signal you can try to switch it off, wait and switch it back on.

This is a step-by-step tutorial. If you have iPhone 3G this guide will help you jailbreak and activate the device. For iPhone 2G it will also perform the unlock.

I recommend using 2.2 firmware, because iPhone 3G unlock is avaliable now. But you can use it with old v2.1, v2.0.1 and v2.0.2.

1. If you’re using old firmware and want to upgrade, please, do it via iTunes.

2. Go ahead and download QuickPwn 2.2 (download links).

3. Download firmware (download links).

4. Close iTunes (if opened) and start QuickPwn. You will see the following:

5. Connect you iPhone or iPhone 3G and push next button.

6. Your deveice is detected. Click browse to select firmware image.

7. Select the image that you downloaded in step 3. Make sure this is the same version that you currently have on your iPhone. If you want to upgrade go to step 1.

8. The application will verify that you choose the right version of firmware image. Click next.

9. You will be frequently using Cyda, so make sure to check it. Installer is in beta, but it will be updated in the future, so check this one too. Click next.

10. Check if your device is connected and hit next.

11. This is probably the hardest part. You will need to press Home and Power buttons on your iPhone in the special order. So make sure you read instructions carefully and follow them. If not, not big deal, you’ll be able to start from step 4.

There are 3 steps here: hold down Home button for 5 sec, than hold Home and Power button for 10 sec, than hold Home butting for 30 sec.

12. Than you’ll have to wait whilce QuickPwn will do the work.

13. Congratulations! You did it. Now you can run Cydia Installer and install usefull and free applications.

This is a tutorial, that shows step by step how to use installed Java on the IPhone. Just in case you do not have Java installed on your IPhone there is a tutorial how to do it.

What we need is a working jailbraked IPhone with Java Installed. I used latest firmware 1.1.4, unlocked, jailbreaked and customized by winpwn.

Step 1: Create simple Java application, compile and run.

1. Create file Java4IPhone.java and put simple Java hello-world code there. I used the following code:
2. Upload to IPhone. I used /tmp directory. For uploading I used IPhone Browser.
3. Run Terminal.
4. Use command java -fullversion or jamvm -fullversion to see if java is avaliable.
5. Use command jikes to invoke java compiler.
6. Go to /tmp directory, using command cd /tmp
7. Compile. We need to specify classpath to basic java packages. If we do not do that, jikes will produce an error (see screenshot). So use the following command: jikes Java4IPhone.java -cp /usr/lib/rt.jar
8. After compiling Java4IPhone.class file should appear in the same directory. To run use commandjava Java4IPhone
9. Take a look at the screenshots. Hopefully you’ll have something similar.

Step 2: Have fun!

This is a tutorial, that shows step by step how to install Java on the IPhone.

What we need is a working unlocked and jailbraked IPhone with Installer. I used latest firmware 1.1.4, unlocked, jailbreaked and customized by winpwn.

First of all I’d like to say we all want to use legal IPhones and operators. So everything written below is for testing purposes only . Hopefully this technology will be avaliable on all IPhones sold worldwide. You also might need to recover your IPhone, so make sure you backed up all your data. I personally did everything without any problems and needs to recover. Everything you do is your responsibility, etc…

So let’s start, because it’s worth it! It’s just one evening and you will be able to create your personal Java application, compile and run it on the IPhone, and amaze all your friends .

There are two steps:

Step 1: Go to Installer and install Mobile Terminal and Cydia Installer.

1. Go to Settings -> General -> Auto-Lock and set it to Never. This will avoid some troubles during installation.
2. Run Installer. Repository for Terminal should be already there (BigBoss), because it is in latest Community Sources.
3. Add repository http://apptapp.saurik.com for Cydia Installer and refresh
4. Go to Install -> System
5. Find Term-vt100 – Mibile Terminal App. I used version svn278. Install it.
6. Go to System again and find Cydia Installer – The Future of the IPhone. I used version 1.0. Install it.
7. Exit. Restart IPhone. Two icons for Terminal and Cydia should appear.

Here are some screenshots for Step1:

Step 2: Go to Cydia Installer and install Java.

1. Run Cydia Installer.
2. Go to Install – Java section. You will find many programms there.
3. Select IPhone/Java. It will install most of the needed packages, which includes vm, libraries, etc.
4. Click confirm and wait a little bit.
5. Go to Java section again and install Jikes package (itwill be probably the only one left). Jikes is a compiler.
6. Go to Installed Packages tab. Check that Classpath, IPhone/Java, JamVM, Jikes are installed. Several other packages will be there too (Java SQLite, JocStap, etc).
7. Exit Cydia and restart IPhone. Congratulations!!! You’re done installing Java.

That’s it. The tutorial about using all this stuff is here