• Analysts expect initial iPhone 6s and 6s Plus sales of 12m-13m
• Robot among first purchasers of smartphone with 3D touch technology
  

The iPhone 6S and 6S Plus hit stores around the world on Friday, at the start of what is expected to be a record weekend for sales of Apple Inc’s marquee product.

Eager buyers – joined by at least one robot – flocked to Apple stores from Sydney to New York, itching to get their hands on the new models, which boast a 3D touch feature and an improved camera.

Related: Apple predicts iPhone 6S sales will break records