Well, as always, I could be wrong. Perhaps the LTE radios are different than GSM. If you could change those frequencies via software there would have been much rejoicing over here, at least among the jailbreaking community, I'm sure. It would have opened up a few more carriers to faster iPad/iPhone use.
I could not find anything in the AppleInsider news. If it is in the forums, they do not have any more of a clue than we do. In a few cases, there may be a few frequencies that are within the AT&T chipset that have a few frequencies that can be activated through an update. Most of the other frequencies will not be available on this chipset. As long as it will take for many countries to adopt widespread 4G, it will not matter until the next generation of iPad. By then, I expect the chip to be available that will combine Verizon and AT&T 4G and many others providers.
Now the dilemma is even though one by one all countries start having 4G, the Hardware in the iPad-3 is designed to work only with U.S & Canadian Network Service Providers. Why such a short sightedness from Apple, instead of having a world compatible 4G hardware??
With the iPad it's obviously reached the tipping point for them, but that does not mean it's a fully mature standard that will work world wide. It isn't, and without a market as big as the U.S. (where 4G has become a marketing mantra) they probably would have held off one more generation on the iPad too.
Here is the iFixit iPad teardown. They managed to get it a day ahead by going to Australia and doing the deed there.
iPad 3 4G Teardown - iFixit
I've only read the first page so far; then I remembered your question. It appears that the iPad is one of the the same 4G model that will be sold in the the U.S: However there is a warning on the back that says the 4G will not work in Australia.
Unless I find something to contradict this further in the article, this would mean that Apple has not created specific models for countries that do not have LTE. So it looks like you'll have a mostly useless LTE radio. The good news is that if you come vacationing in the U.S. you'll be able to get a 4G LTE SIM and use it here.
Update: It shows the LTE chip in Step 17, third page. It is also the 3G chip, which would be why Apple includes LTE in the overseas models. The price difference between the 3G only chips and 4G/3G chips probably isn't enough to make up for extra logistics and bulk discounts.
Last edited by twerppoet; 03-15-2012 at 06:51 PM.
I always enjoy the iFixit teardowns.
Apparently a few European teleco's have been getting shirty with apple for selling it in Europe as a 4g model.
Until it settles down here in the uk, I think I'll stay with wifi and tether...