Apple may not show off a curved display on iPhone 6 release date, according to an analyst.

Research director for consumer devices at Current Analysis Avi Greengart said Apple may not include the rumored curved screen display in the upcoming iPhone 6 bound for release next year.

"I have absolutely no doubt whatsoever that Apple is investigating curved displays and any other component coming on to the scenes. That's what Apple does. Apple tests things out internally to see if they make sense," Greengart said.

"That doesn't mean, however, that just because Apple looked at something that they're going to release it. They probably have watches, glasses, hover boards, and who knows what else just to see what it's like," he added.

Samsung Galaxy Round is the first smartphone to pack a curved screen display and will soon be followed by LG G Flex. Greengart said while the technology is impressive, its advantages are still unclear. However, he noted the technology will further evolve to be a useful feature in devices.

Greengart is the latest analyst to agree that iPhone 6 will most likely pack a bigger screen display. Reports claimed that Apple is already testing screens that are 4.7 and 5.5 inches in size. Greengart said that Apple may finally yield to the overwhelming demand for larger displays in its flagship phone. iPhone's 4-inch display is small when compared against its rivals.

Bloomberg first reported that Apple is following the footsteps of South Korea tech companies LG and Samsung in developing curved screen displays for smartphones. Bloomberg added Apple is developing two new iPhone models with larger curved displays and enhanced pressure sensors that could be released next year.

iPhone 6 release date is still unconfirmed but rumors point to a launch in March next year. However, consumers may not see an iPhone to be released soon as Apple is adding more suppliers to boost the availability of the current iPhone 5S, according to a report from Wall Street Journal.

Reports also claimed that iPhone 6 will include a Sapphire glass on its screen display that will battle Corning's Gorilla Glass packed in most Android smartphones. Apple recently signed a $578 million deal to open a plant in Arizona with GT Advanced Technologies. The latter will be in charge with the inclusion of the rumored Sapphire glass on the handset.