eXDee: Can you explain APC 700 vs the USA's 700mhz? I assume this is because the USA is using FDD-LTE and everyone else is using TDD-LTE?

The issue is essentially just the frequency bands and blocks in between that can't be used in the US.

I'm pretty sure the APC700 band has been ratified as FDD, the US use FDD for their 700Mhz and all the current 1800MHz networks are also FDD. From memory it's only 2300 and 2600 where TDD networks have been deployed.