Their 4G models J500F/G and J700F/G come with no warranty.
The ones coming with official warranty J500H and J700H are 3G enabled.
J5, even after having limited 8GB internal storage (with 128GB expandable storage) is still one of the best Samsung budget phone I have ever used.
Battery timings is excellent, Super AMOLED display is awesome, camera is very good and performance is sufficiently fast (not ultra fast) with no hanging issues.