Kay, I was an original phone retailer,
and i can tell you this, there is no way to know that the accessories in a phone package is genuine.

And for the debate on whether to get ori or AP differs to people.
It depends on which company you purchase the phone(for AP), is the company reliable. and are the services good, the advantages of getting AP is that you got a longer warranty period for the phone. And to SE S500i buyers, please do not claim for warranty for keypads becoz sure tak layan wan. Its a fact that SE S500i keypads break easily and stated on the warranty card is which part do they help you with. WHICH EXCLUDES KEYPADS.

for ORI buyers, dont get to cocky too,
Its known that ORI buyers can claim warranty for damaged goods.
WELL THINK TWICE!
for samsung, min 1 month is required to service phones
and service fees are charged for delivery for phones and they arent cheap.

And most damage to phones i see daily in my line of work is that phones that enter water, keypad broke and firmware
these damages normally are due to the owner as they did not really take care of their phones.