Can both be used in SG?
Amazon USA states "Device can only be used with AT&T network".
I know it stated unlocked, but just making sure.
USA version only has LTE band 7 or 2600mhz that is deployed more for outdoor and at the coast. LTE band 3 or 1800mhz is the other band that has better indoor coverage and penetration.
Technically the USA version can be use in SG but ur signal may change to 3G depending on which telco u are on.
For me I bought from Amazon UK for the European version which arguably has better compatibility with local networks as both LTE band 3 and 7. Again, no guarantee that it would work.
If u are not into technically, then wait for my set to come in. I will do a review of the European version.