Hello, I bought the T-Mobile iPhone 6 less than a fortnight ago on the reassurance that it will work internationally. I'm currently living in the US but am not sure where I'll be next year for various reasons, so this was important to me. Now the unlocked iPhone 6 has come out, I understand it supports more bands. So am I wrong in thinking my current phone will work internationally? Are the extra bands particularly common outside of the US? Basically, is it worth me spending my afternoon switching everything over to the new model at the Apple Store, or not really? Thanks in advance.