Thanks for your advice! But I think those are really the general tips for spotting an obvious fake phone. And what about those "revamped" or even "cloned" phones? I know there're those stuff in China. And I think it'd be much harder to tell from the appearances.
General tips? I really don't know what more you want us to say. I've been here long enough to know where to buy from, and what I should be looking for, regardless of what product in buying.
The only way you'd buy a clone or copy Note 4 is if it was from a dubious ramshackle shop and a significantly reduced price. Just use common sense. If it's too cheap, it'll be a copy or fake. If it feels flimsy and not well built, it's a fake.
Here's some simple ways to get what you want:
1. Buy online from Amazon.cn, gome.cn, or jd.com
2. Buy from a carrier store.
3. Buy from a shopping mall.
4. Buy from a chain store like Gome (国美).
5. Argue the price. You won't get any money off.
6. Pay ¥5,199 for the Unicom/Mobile/Telecom versions, or ¥5,399 for the non-carrier 9100 version.
If you buy from a store, they will show you the unsealed box, warranty cards, IMEI barcodes, etc.
When I was buying mine they let me play with the display model for 3 hours, answered questions, tested SIM cards etc. Then when I agreed to buy they brought an sealed new one and let me fully inspect that too. Way better service than I'd get at home. The sales people in the reputable stores I listed are very helpful - they want too make a sale not rip you off.
Seriously, you're massively over-stating things.
Sent from my SM-N9100