Early adopters of Apple's iPhone 4S smartphone are complaining of bugs in the system, causing the battery to drain rapidly and voice calls being spoiled by an eerie echo.
While the battery drain bug has its workarounds - it's thought to be related to a time zone bug, and iDownloadBlog suggests that switching the 'Setting Time Zone' option to 'off' fixes the main cause of prematurely dead iPhone 4Ses - the voice echo problem is a bit more difficult to fix.
According to users posting to Apple's official support forums, the problem occurs when the iPhone 4S is used with a wired headset, manifesting itself as an irritating echo that makes conversation near-impossible.
"When using the Apple hands-free headset with the phone during a call, I get an echo problem," one thread reads. "It does not occur immediately. It can vary from 30 seconds into a call and as far up to 9 mins before it begins."
In testing carried out by BGR, the fault was found to occur between one and four minutes after starting the call and happens whether Apple's own wired headset or third-party models are used.
There are only two semi-workarounds available at present: one is to use a wireless headset or the phone's speakerphone mode, and the other to quickly enable then disable the speakerphone mode while using the wired headset.
The former is, of course, no fix at all for users of wired headsets, while the latter is only a temporary fix gaining you another few minutes of echo-free chatting.
Apple has yet to comment publicly on the matter.