Here in India we're getting headphones in the box. I bought my 5x second-hand and the previous owner hadn't even opened the headphones. Got lucky there :) Just check the model number of both the phones and see if they match.
I'd choose the Nexus 6P. Bigger and better screen. Bigger battery. And a better chipset and RAM package. Oh and those lovely front-facing stereo speakers.
Hey even I have the same combo! I've had the OnePlus for the past few days and I bought the passport today. I'm liking the Passport so far.
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