Buying From Amazon

Hi Pebblers, Since Amazon is selling the Pebble Time steel at $199 these few days. I might pick it up from them but some questions I have is that if there will be warranty if i chose to buy from Amazon. And have any of y'all brought from Amazon before? I'm living in Singapore by the way, so how will the return process be if some issue arises? Also, I have a Oneplus One on Marshmallow, how is the compatibility like? Cheers everyone. :)