I'm confused by the new LTE page for iPhone 7 (http://www.apple.com/iphone/LTE/). While I understand that the T-Mobile/AT&T models A1778/A1784 does not work with Verizon or in countries that use CDMA, how come that the Verizon/Sprint models A1660/A1661 does list any other countries than China, Hong Kong, Puerto Rico and USVI? Shouldn't the A1660/A1661 models work in all the countries of models A1778/A1784 plus these additional four? And what about the "carrier free' model that is usually released several weeks after the initial release? Will that one work in the most countries? I travel a lot and would like to be able to use my phone mainly in Europe but also in China and Japan. I use T-Mobile here in the US.