Apple has been forced to withdraw an update for the iOS 8 operating system, after it appeared to cause more problems than it solved.

The tech giant had released the new version of its software to fix glitches reported by iPhone and iPad users.

But customers who installed the update have reportedly had difficulties making phone calls, and have been unable to use fingerprints to unlock their device.

According to the Sky News, many of these latest flaws only seem to affect the iPhone 6, with older models less vulnerable to the additional glitches from the software update.

An Apple spokeswoman said: “We have received reports of an issue with the iOS 8.0.1 update. We are actively investigating these reports and will provide information as quickly as we can. In the meantime, we have pulled back the iOS 8.0.1 update.”

But for many disgruntled users, news of the problem came too late, with many unable to use their devices as normal.

One affected customer, Rob, tried to alert his friends by tweeting: “Not happy with my phone not working as a phone now. DO NOT UPDATE TO iOS 8.01.”

Meanwhile, Aquib Hossain warned: “Do not upgrade to iOS 8.0.1! Touch ID stops working but worse yet, you can’t connect to your wireless service.”

The problems come amid warnings from experts that Apple’s OS X operating system has a security flaw which could be more serious than the notorious Heartbleed bug.

The have also been complaints from iPhone 6 Plus owners, who claim their smartphone had bent substantially after being placed in a tight pocket.

More than 10 million of the new devices were sold in the weekend after its launch last Friday.

The iOS update had been intended to fix bugs in the operating system which had stopped the much-anticipated HealthKit feature from going live last week.

According to a description from Apple, the download was also meant to make it easier for apps to access photos, and to address a glitch seen in the Safari browser.

Affected users are being advised to revert to the original version of iOS 8.

Meanwhile, Apple has responded to claims that its new handsets are prone to bending by saying such damage would be “rare” during normal use.

Media outlets across the globe had reported that several iPhone 6 owners had complained of handsets becoming misshapen after being carried in trousers pockets without a case.

According to the British Broadcasting Corporation, several of the US firm’s rivals have also helped publicise the claims.

Apple said nine customers had told it their iPhone 6 Plus phones had bent.

In a statement the company noted that the handsets’ shells had been constructed out of “anodised aluminium, which is tempered for extra strength” and also featured stainless steel and titanium parts to reinforce the areas of the phones likely to experience the most stress.

“We chose these high-quality materials and construction very carefully for their strength and durability,” it added.

“We also perform rigorous tests throughout the entire development cycle.”

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