Photo: OnePlus 6 has become the highest selling smartphone in terms of revenue on any single day. Amazon India, the e-commerce partner for the newest OnePlus flagship, said the smartphone achieved the feat during the early access sale for Prime members held at 12PM on May 21, 2018. The company says OnePlus 6 has received strong demand among those subscribed to Amazon’s Prime membership. Amazon India says OnePlus 6 recorded approximately 3 million pre-launch ‘Notify Me’ registrations on the e-commerce ahead of its official announcement at an event in London on May 16.