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Because of Apple policies, the VoIP software can use WiFi connections only and not 3G.
In other words you can not make skype calls on the road.
In order to do it, this is what you need:

1-Your iPhone must be jailbroken, if it’s not, read this.
2-Install your Skype or Fing app from the App Store.
3-Install 3G Unrestrictor from Cydia.
4-Open 3G unrestrictor and add the desired applications (skype, fringe, whatever you want)


Ready

By defult the Skype iPone App does not support Video.
But there is simple workaround: Use Fringe.

First you must have a
account

Then from your iPhone go the App Store, search fring and install it.
Open the fring app to open a fring account.

Ready now you have skype with video.

Celular rates are expensive everywere and international fees too.
So, how to make cheap international calls from your iPhone?
Simple, use


Click this link and get Up to 10,000 calling minutes to landlines for one low monthly fee – the new Skype calling subscriptions.

OK, now is beginig to be possible to sync your music from Ubuntu to your iPhone, thanks to the work of marcan and many others.

Disclaimer: This is very Alfa software, I didn’t invented any of the things I’m writing about, I just adpated the marcan instructions in the way they worked for me, to my personal systems, wich I’m sure many are using: Ubuntu Karmic Koala 9.10 and iPhone 3G with OS 3.1.2, by the way you need to have some music synced by iTunes before you can start.
Don’t cry if your iPhone melts:

1- update your system, either via synaptic or with

sudo apt-get update

sudo apt-get upgrade

2- Add the PPA repository with the needed packages :

deb http://ppa.launchpad.net/jonabeck/ppa/ubuntu karmic main

Either adding it as root to your /etc/apt/sources.list file

Or with the GUI “Software sources”

Then add the key for the repo with this command:
sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com F0876AC9

And update again with:

sudo apt-get update

3- Install the packages required for compilation, and the already packaged libraries:

sudo apt-get install git-core cmake autoconf libtool libglib2.0-dev intltool gtk-doc-tools libsqlite3-dev libxml2-dev  libiphone-dev libplist1 libusb-1.0-0 libusb-1.0-0-dev libusbmux0 libusbmux-dev ifuse libiphone0 libplist0 libplist-dev

4-Get the libgpod code and compile it:

$ git clone git://gtkpod.git.sourceforge.net/gitroot/gtkpod/libgpod
$ cd libgpod
$ CFLAGS=”-g -O0″ sh autogen.sh –prefix=/usr
$ make
$ sudo make install

5-Create a folder to mount it, and mount it:

sudo mkdir /media/ipod

**connect your iPhone**

sudo ifuse /media/ipod

6-Create the needed directory and files:

cd /media/ipod/iTunes_Control
mkdir Device

Find your UUID with

lsusb -v | grep -i iSerial

grab your UUID wich is the 40 characters long text
and run the following command replaceing with yours:

ipod-read-sysinfo-extended /media/ipod

This has generated a needed file into the Device folder.

7-Thats it. Now you can open the gtkpod application and sync your iPhone.

Notes:
In order tu unmount your iphone first dissconect it via gtkpod and the you can use

sudo umount /media/ipod

And to mount it again just

sudo ifuse /media/ipod

There is a way to sync your files in the iphone, and also shering not only with ubuntu, but also with Windows or Mac.

It’s a free service called dropbox that offers 2Gb of space for your files.

1-Click here to go the dropbox website and create a free account.

2-Click on the Install link to Download dropbox and install it on your PC, there are versions avilable for Ubuntu, Fedora, and Sources (there are also Windows and Mac versions).

3-On Your iPhone go to the Apple Store and search for dropbox and install it.

4-Now You have a Dropbox folder in your PC, and a Dropbox app in your iphone. Any file that you copy to your Dropbox folder will appear on your iphone, and viceversa.

Have fun!

The first iPhone virus has been created this month. It only affects jailbroken viruses, because it gains access via the default ssh password.

In order to protect your iPhone for this and maybe further viruses: read this how-to to change your default ssh iphone.

When an iPhone is jailbroken, and OpenSSH server is installed in order to provide remote access.

There are two accounts root -the superuser- and mobile -the standard user-.

Both accounts have a default password: alpine

In order to change the passwords you can do it via regular Linux commands:

• Access the iPhone via ssh from your PC (you can install putty on windows to do this)

ssh root@your.iphone.ip

Note: If this is the first time you connect this PC to your iPhone you will see a warning abiout fingerprints, say yes.

• and type the passwd command, it will prompt you for your password twice, when you type your new password nothing will be prompted:

passwd

• type exit to dissconnect

exit

• Repeat the steps but this time for mobile, start with:

ssh mobile@your.iphone.ip

I have a previouse post about how to jailbrake an iphone but now it may be diffrent, there are two publishers of jailbreaking applications: the Dev-Team and geohot (any other source you find is just selling what they give for free).

Well, geohot has published a new app called blackra1n, this is definitivelly the fastest jailbreak I have ever seen. Not even a how to is really needed, just go to his site, download, run, follow the onscreen instructions (basically, click, connect, and wait)

And have fun!

There are not technical reasons, only Apple marketing policies, but the iPhone is not allowed to run multiple applications simultaneously , by design only the phone, mail, ipod, and maybe some other Apple application can run in the backgroud.

This is of course not the desired behavior for many cases…

Multitasking you can, for example:

• Have a messaging service available at any time.
• Have an IP phone (e.g. skype, gizmo5) available all time.
• Pause a game,  go to write an email, read the news, and go back to the game…etc.
• etc

So this is what’s needed to enable Multitasking in your iPhone:

1. In order to enable it, the iPhone must be jailbroken, if  it’s not, there’s a jailbreak how to here.
2. From Cydia (or Icy), search and install the backgrounder app. This will provide the availability to run applications in the background.
3. From Cydia (or Icy), search and install the application kirikae. This will provide a task manager that will let you switch between open applications and close them. You can also add favorite apps to open faster.
4. Have Fun

There is a new version of the Virtual Memory application for the iPhone:

• The original iPhoneVM had a fixed swap file.

• This new iPhone VM 2 has a dynamic swap file.

If you try to install it it will uninstall the other version.