MB123XX/A or MC123XX/A is the device code and XX is the regional identifier (or however it is called).

This code you can find in this list:
AB Egypt, Saudi Arabia, United Arab Emirates
B Ireland, UK, also used for some replacement phones
C Canada
CZ Czech Republic
DN Austria, Germany, Netherlands
E Mexico
EE Estonia
FB France, Luxembourg
FD Austria, Liechtenstein, Switzerland
GR Greece
HN India
IP Italy
J Japan
KN Norway
KS Finland, Sweden
LA Colombia, Ecuador, El Salvador, Guatemala, Honduras, Peru
LE Argentina
LL USA
LZ Chile, Paraguay, Uruguay
MG Hungary
NF Belgium, France, Luxembourg
PL Poland
PO Portugal
PP Philippines
RO Romania
RS Russia
SL Slovakia
SO South Africa
T Italy
TA Taiwan
TU Turkey
X Australia, New Zealand
Y Spain
ZA Singapore
ZP Hong Kong, Macau

The app lets you create professional auctions listings on your iPad itself, and it’s very easy to use. Once the app is authorized by eBay, you’re ready to go. It’s super easy to create an auction and you the customization is just amazing. The finished listing look great and professional, just like the ones you create on GarageSale for mac. I’d say the app is worth the price and would recommend it for all the iPad users.

GarageSale HD lets you create, edit, track, and manage all your eBay auctions directly on your iPad.

GarageSale’s Main Features:

- Supports 16 different eBay sites including eBay.com, eBay Motors US, eBay.ca, and eBay.de
- Includes 10 professional auction designs
- Offers free hosting for your auction images, thus saving your eBay’s image hosting fees (has be to activated in application preferences).
- Lets you add existing images to your auction or take new snapshots directly from within the application
- Automatically downloads category and attribute data updates from eBay as they are released
- Displays previews of your auction before uploading them to eBay
- Retrieves and displays real-time fee information from eBay
- Shares prepared auction with GarageSale for Mac using Bonjour sharing
- Saves prepared auctions for later refinement

The User Interface: A cartographic interface is just beautiful and cute, there are several nice animations and overall the UI is just awesome and the Grid lens teams has done a great job with it. Its one of the most creative designs I have seen, and its really simple to use.

Taking Photos: There are a variety of customization possible. You can create grid or your own, change the grid color, border width etc. You can take photos by, either tapping each grid one by one, or, just tap the Shutter button and it will automatically capture each after a preset time interval, which you can change in the setting menu. (burst mode and manual shoot mode)

Editing: The app offers several filter that the makes the photos even more magical.

Sharing:  You can share your photos online, through twitter, facebook, flickr, Instagram and email.

You can view a Flickr group of Grid lens photos here.

You can get Grid Lens from the App Store here.

So right now those users who are having old devices like iPhone 4 or etc and can’t unlock it as they are running their devices on AT&T carrier, don’t worry all what you have to do is make a call for the carrier and dial 611 from my current iPhone, and navigated my way through the automated system. After a few minutes I landed in the tech support department, with a customer service representative who obviously hadn’t gotten the memo yet.

After this they will ask you to give them your iPhone’s IMEI number, after that AT&T will submit your request for unlock. That’s it right now wait about 20 minutes But if I would have known that the unlock request could have been submitted through AT&T’s online chat service, I probably would’ve gone that route.

You can give it a try and call AT&T where they will unlock your iPhone by sending a code and some instruction in a message then wait about 20 minutes until your iPhone is unlocked, that’s it you are done..

Follow the steps below which shows you how to use GreenPois0n Absinthe to jailbreak iPhone 4S on iOS 5 / 5.0.1 and iPad 2 on iOS 5.0.1.

Downloads

• Download iTunes from here.
• Download Greenpois0n Absinthe 0.1.2-2 (Mac OS X [mirror] – Windows [Guide])
• Download iPhone 4S 5.0 (9A334), 5.0.1 (9A405) or 5.0.1 (9A406).
• Download iPad 2 5.0.1 (9A405)

Steps

STEP 1: Backup your iPhone, iPad or iPod touch and restore it using the iOS 5.0.1 or 5.0 IPSW file downloaded above.

STEP 2: Plug in your iPhone 4S or iPad 2 you want to jailbreak.

STEP 3: Now open GreenPois0n Absinthe and make sure that your device is detected then hit the jailbreak button as shown.

STEP 4: Now you’ll see “Restoring in Progress”, you should wait for few minutes. Once done, get on your iPhone and you’ll find an icon named “Absinthe”, hit it and this will open greenpois0n.com which will install Cydia on your device replacing the Absinthe icon as shown.

Errors:

• For FATAL(_LINE_) error, go to Settings > General > Reset > Erase All Content And Settings. Then do the procedure all over again.
• For Camera Roll error: You can simply fix this error by rerunning the jailbreak on the A5 device.
• For error establishing database connection : You can fix “error establishing a database connection” message by going to Settings > General > Network > VPN > ON. Now try again and you won’t receive this message.

Before you start, make sure that you have updated your device and created a backup so that you can restore your apps, photos, media, contacts and everything. Also unlock your device by typing the passcode if necessary.

STEP 1: Download CLI Absinthe for Windows and Mac OS X from here.

STEP 2: Unzip the folder named cinject_0.4.3 into the system folder, i.e. C:\.

STEP 3: Now go to the start menu, click on run and type in cmd.exe.

TEP 4: In the command window, type: CD C:\cinject_0.4.3 as shown to get into the required folder.

STEP 5: You’ll now need to execute CLI. Do this by typing: cinject.exe -i payloads/jailbreak.mobileconfig

STEP 6: Now execute cinject.exe -j payloads and wait for the backup.

STEP 7: Finally execute the command cinject.exe -w.

STEP 8: Get in your device and tap on Absinthe icon to get your jailbreak done in few minutes.

Errors:

• For FATAL(_LINE_) error, go to Settings > General > Reset > Erase All Content And Settings. Then do the procedure all over again.
• For Camera Roll error: You can simply fix this error by rerunning the jailbreak on the A5 device.
• For error establishing database connection : You can fix “error establishing a database connection” message by going to Settings > General > Network > VPN > ON. Now try again and you won’t receive this message.

Name: Unknown
Cost: Free
Host URL: Requires Donation
Description: I have not personally tested this paid Spire Proxy Server but I have heard that it is legit. The creator of this Spire Proxy server, however has mentioned his servers are full at this time (more will be available soon). Click here for more information.

Name: Unknown
Cost: Free
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Cost: Free
Website: http://root-hacks.blogspot.com/
Host URL: https://siri-bh.no-ip.org:1000
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Needed crt: http://siri-bh.no-ip.org/blog-4.crt

The following proxy hosts have been identified as scams:
Name: siriproxyserver.t15.org
Name: http://jakewilliamsmith.com/siri/
Name:  http://www.sirikeys.com/

More Coming Soon (list is updated as more are discovered)…

Download it now!

iOS 5 beta 2 direct download links have been given below (via) but please download iOS 5 beta 2 at your own discretion. In order to upgrade your iPhone, iPad and iPod touch to iOS 5 beta 2, you also need to download iTunes 10.5 beta 2.

iPad 2 (GSM): 1, 2

iPad 2 (CDMA): 1, 2

iPad 2 (WiFi): 1, 2

iPad 1G: 1, 2

iPhone 4 (GSM): 1, 2

iPhone 4 (CDMA): 1, 2

iPhone 3GS: 1, 2

iPod touch 4G: 1, 2

iPod touch 3G: 1, 2

AppleTV2: 1, 2

Download iTunes 10.5 beta 2 for Windows and Mac

iTunes 10.5 Beta 2 For Mac OS X.

iTunes 10.5 Beta 2 for Windows 64 bit. (Mirror)

As outlined by Apple in the handsets’ description:

Get all the features of iPhone 4 — FaceTime video calling, Retina display, HD video recording, and more — in a phone that you can activate and use on the supported GSM wireless carrier of your choice, such as AT&T in the United States.¹

If you don’t want a multiyear service contract or if you prefer to use a local carrier when traveling abroad, the unlocked iPhone 4 is the best choice. It arrives without a micro-SIM card, so you’ll need an active micro-SIM card from any supported GSM carrier worldwide.