According to Economic Daily News, testing involves evaluating the use of OLED or Micro-LED display technology, "because the choice of either screen will affect the subsequent assembly methods".
Apple has also asked Foxconn to perform over 100,000 opening and closing tests.
"Similar tests for laptops require to be open and closed between 20,000 and 30,000 times," the report said on Tuesday.
Since foldable phones will be folded and unfolded far more frequently than laptops, the bearings inside them also need more rigorous testing.
The first foldable
This is not the first time Apple is rumoured to be working on a foldable iPhone model.
According to earlier reports, Apple ordered a batch of foldable displays from Samsung, suggesting that it is working on a foldable iPhone.
SEE ALSO:
Here’s how much the new Apple MacBook Air, Pro, Mac Mini will cost in India
Apple illegally tracks iPhone users to target them with ads, EU privacy activism group claims in lawsuit
Why won't my AirDrop work? How to troubleshoot an AirDrop connection between Apple devices