Just come back from France. Roaming with data worked fine on my P6, though a few times in restaurants or shops I got the dreaded (!) in the signal bar. Not sure whether that was a continuation of the signal issues people have had with this phone, or just rubbish French networks, or just being inside a big structure blocking signal.
The only thing I can think of that may work differently in the US specifically is that there are two SKUs of the P6 - one with mmwave and one without. If I understand correctly, the mmwave models are only sold in the US. But a UK model should work on US networks.
The only thing I can think of that may work differently in the US specifically is that there are two SKUs of the P6 - one with mmwave and one without. If I understand correctly, the mmwave models are only sold in the US. But a UK model should work on US networks.