The only way to get an iPhone on T-Mobile the past few years was to go out and buy an unlocked iPhone and put a T-Mobile SIM card in it. Now that T-Mobile has become an official carrier, a lot of iPhone users that are already on the carrier want to be able to use LTE but can’t.

To make things better, T-Mobile says they’re going to rollout an update for all unlocked iPhones on the network starting April 5th. The update will flip the switch on features that aren’t currently available, like LTE and Visual Voicemail.

Shipping times for the new 21.5- and 27-inch iMacs were this weekend reduced to just 1-3 business days for customers in the United States and Canada. Both machines have been in short supply since they went on sale back in November, and just one month ago, the shipping delay reached its peak when it slipped to 4-6 weeks in Europe.

iPad mini shipping times have today been reduced to just 1-3 business days at the Apple online store, which is the shortest wait the device has seen since it made its debut back in November. The new timescale currently applies only to the U.S. and Canadian stores at the moment, but it’s expected to roll out into other territories soon.

No surprises as the latest Nielsen numbers show Android and iOS leading U.S. smartphone market share. Both operating systems continue to gain at the expense of RIM — who has all but fallen into the “Other” category. Speaking of the “Other” category: Windows mobile, Windows 7, Symbian, and Palm/WebOS were all grouped together, combining for a measly 5.9% market share.

Nielsen, global leader in measurement and information, takes a look back at the State Of Appnation and how much has changed over the past year. Since Nielsen’s 2011 summary, the number of U.S. smartphone users has increased by 12.4%, with one in two mobile subscribers now owning a smartphone. With the rise in smartphone users, comes a rise in the number of apps being downloaded, as well as the amount of time users spend engaged with them.

Earlier in this day, we reported on a New York Times piece in which the paper claimed that Apple was using a variety of measure to avoid paying U.S. income tax. It turns out that the Times based key pieces of its information on a study that had been discredited two weeks prior.

The data used by the Times included a report by the Greenlining Institute, which made errors in computing Apple’s supposed tax rate at 9.8% for the 2011. The data used by the report effectively compared Apple’s 2011 profit with taxes paid by the company for profits in 2010 and drew unfounded conclusions as a result.

Over the weekend, the New York Times ran another in its series of exposes about Apple. This one focused on Apple’s complex mix of offices and subsidiaries located throughout the world and the U.S. that allow the company to keep large portions of its more than $100 billion in low-tax states and countries.

The report comes after the paper’s expose on working conditions within Foxconn, the contractor that Apple uses to assemble most of its products and calls by politicians and members of the media for Apple to move more of its manufacturing and money to American soil.

Following reports that the new iPad may be experiencing Wi-Fi issues that lead to unreliable connectivity and slow connections, a leaked AppleCare document confirms that Apple is investigating the issue, and will replace units that are affected… in the U.S., at least.

If you are looking for the best online deals from an Apple Store, it would pay to head to the United States, or any English-speaking store, a new analysis finds.

Does talk of the Euro economic crisis make your eyes glaze over? Perhaps this will get your attention: The down European economy is costing the iPhone marketshare as consumers keep a tight hold on their cash. The bright side: the U.S. and U.K. love of everything Apple has become stronger.