Look what we found. RM-937 was tipped to be the Lumia 1520 Global variant by one of our tipsters, with RM-938 supposedly T-Mobile bound.
Now, it indeed looks like Lumia 1520’s Global variant as confirmed by “Occasional gamer” log stats entry. Now, this makes RM-938 most probably T-Mobile variant as it has T-Mobile’s WCDMA and LTE frequencies, but it may be China Unicom variant as well, though chances of that look less likely.
This increases the chances of T-Mobile or China Unicom lapping up Lumia 1520 with inbuilt wireless charging, while AT&T (RM-940) and Global variant will have wireless charging with support of cover.