you scared and doubt but you still buy from them??

1.Check the warranty sticker MUST be from SIS (Local authouris Distributor) if no SIS sticker then its AP set, and the date stamp on the sticker.
2.Check the incoming / outgoing call record refer to Leevithan instructions the time should be 0:00.
3.Use your nose to sniff the unit, New set usually got fresh smell from the packing too if used set not so smelly .. . Just joking, dont try this.

good luck.