Just got back from Europe last week and I got good use of the dual sim capabilities on the XS. One thing I noticed that when I was roaming using my ATT sim, the data connection said LTE. But when I used the local SIM (same provider that ATT was roaming on), the data connection said 4G. Is 4G and LTE the same thing? Is the LTE display next to the carrier only used in the US? This is the first time using a local SIM so I've never seen the 4G before. One thing I noticed was that the local SIM was much faster than using the same carrier via the ATT SIM (sometimes twice as fast).