Last month Samsung said that it will launch smartphones with curved display in October.
The panel producers did not receive Apple's certification, as they were given strict power-saving requirements.
The company is headed for its worst annual profit in three years, under siege as Chinese firms like Xiaomi and Lenovo reel in buyers with full-function touch-screen smartphones that are cheaper.
Samsung Electronics Co Ltd on Wednesday launched the world's first smartphone with a curved display, a variant of the Galaxy Note which moves the Asian giant a step closer to achieving wearable devices with flexible - even unbreakable - screens.
Suppliers to Apple Inc are scrambling to get enough screens ready for the new iPhone 6 smartphone as the need to redesign a key component disrupted panel production ahead of next month's expected launch, supply chain sources said.
The technology offers better picture quality than LCD, with crisper picture resolution, faster response times and high-contrast images.
Apple has said the watch will launch in April
India has been opposing the pact as ITA will only benefit the country when its domestic manufacturing is robust.