Thanks. But how can we send to HK? What is the easier way?
If yours is china set, why don't you email oneplus china and ask for repair procedures/costs, person in charge and their address. Just said you are outstationed.
Who knows based on serial number or invoice date, they may consider repairing as warranty set, you just need to pay for shipping to and fro.
If after repairing, they only ship to china address then you need a forwarder address e.g ezbuy.
For shipping, just check with those logistics companies for costs, singpost or those expensive one like DHL or fedex, I think locally can get China top courier, shun feng(SF) express also.
If not, check out those local repair shops to see if they repair oneplus phones.