When it comes to troubleshooting , the iOS is signally problem - free . It is not strange to go weeks — or even months — without have any significant problems with your iPhone ’s software . Still , when a novel version of the Io arrive , as with the recently released iOS 4 , you could expect a least a bit of head - scrape . Most emergence do not center on bugs or other malfunction . Rather , they involve trying to figure out how to get a raw feature to work as expected . With that in creative thinker , here are some troubleshooting tips that provide answers to several of the interrogative sentence you may be ask — and some you may not have thought to require .
•Transfer keychain watchword data point from your former iPhone to your new one . In addition to the just released iOS 4 software , Apple has also free theiPhone 4hardware . If you own an old iPhone and promote to an iPhone 4 , you will almost sure enough want to transport the datum from your old iPhone to your new one . For this , or any other iPhone hardware acclivity , you transplant the data by choose to restore the new iPhone from the iTunes - maintained backup of your old one .
One of the irritating aspects of doing this has been that most passwords hive away in the fill-in do not transfer to the young iPhone . This is done by design as a security trade protection . It prevents someone from find your countersign via a restore of your backup to their iPhone . These keychain - hive away parole ( such as for e - mail account ) are transfer only if you are fix to the same iPhone from which the backup was created . Otherwise , the passwords want to be re - record manually . At least that ’s the way it used to work .
As confirmed in anApple support article , Apple has change the rules in iOS 4 — for the better : “ With Io 4 and later , you’re able to transfer your keychain backup to a new machine if you inscribe the patronage . ”
You inscribe a patronage ( which want create a password ) by selecting the selection to do so in the iPhone ’s Summary CRT screen in iTunes . Based on my experience , this keychain transportation apparently works only if the encrypted relief was created from a iPhone running iOS 4 . When I restore my new iPhone 4 with an encrypted computer backup created from my iPhone running Io 3.1.3 , the keychain passwords did not channel .
•Enable iOS 4 ’s data protection . According to Apple , Io 4 includes an enhanced data protection lineament . It work in conjunction with Passcode Lock , enhance the “ built - in hardware encryption by protecting the ironware encoding describe with your passcode . This bring home the bacon an additional bed of protection for your email substance and attachments . ” The feature sour only with iPhone 4 , iPhone 3GS and the third - generation iPod cutaneous senses .
A potential problem is that , after upgrading an iPhone 3GS or iPod touch from iOS 3 to iOS 4 , the protection feature is not automatically enable . To activate the option , you require to restore the iOS gimmick — via the Restore command in the Summary covert for your gimmick in iTunes . Doing this means all datum on the gimmick will be erased and restored from your backup . After doing this , and assuming you have Passcode Lock turned on , you should now see the “ datum protection is enabled ” message at the bottom of the preferences - > General - > Passcode Lock screen .
If doing a restore just to get this summate auspices sounds like too much of a bother , you could do without the characteristic . Most users will never have a motivation for it .
•Deal with iOS 4 slowdown on an iPhone 3G. While you’re able to upgrade your iPhone 3 gram to iOS 4 , it will be miss a couple of features — such as multitasking and Home concealment wallpaper ( see this Apple written document for acomplete listof what ’s miss ) . Apple claims this was done because the older iPhone manakin does not have the processing major power and/or memory needed to manage these feature .
As it turns out , the older iPhone may not have sufficient power even for the lineament it does get in iOS 4 . legion ( but by no means all ) users have reported a significant slowdown after upgrading an iPhone 3 G to iOS 4 . In some cases , typing response became so slow that there was a important meanwhile between tapping a key and seeing it appear on the screen .
If this happens to you , there is no guaranteed result . Some user report success with powering off and resume their iPhone . Otherwise , on the Assumption of Mary that some package is the cause ( which might explicate why the slow down occurs with some 3 gramme users but not others ) , you could restore and typeset up the iPhone as a new equipment rather than restore from a substitute . You ’ll next require to reselect all the information you want to sync . Hopefully , if there was some corrupted or otherwise knotty software on your gimmick , it will not give .
If the slowdown persists , you might ultimately settle to give up on iOS 4 and return to your prior iOS version . regrettably , Apple does not make this easy to do , as it automatically blue-pencil old update filing cabinet from your Mac ’s driveway when you update to a unexampled version . To stave off the loss of these older update data file , make a backup copy of the depicted object of ~/Library / iTunes / iPhone Software Updates before updating your iPhone 3 K to iOS 4 . Ideally , now that iOS 4 is out , make the backup before connecting your iPhone 3 universal gravitational constant to your Mac while iTunes is running .
If you ’ve already updated to iOS 4 , this advice is obviously coming too late . If you have n’t empty your Trash recently , you might still find the needful Indian file sit down there . Or you might have it on a Time Machine or similar stand-in . Otherwise , you may still be able to download a transcript of the update file from third - company connection sites . Do a search to find it . For iOS 3.1.3 , the name of the data file ends in “ 3.1.3_7E18_Restore.ipsw . ” You want the magnetic declination of the update for the iPhone 3G. Once you have the data file , you broach a downgrade by snap the Restore push button in iTunes while holding down the Option key ; from the dialog that appear select the iOS 3.1.3 update Indian file .
Warning : In some face ( perhaps most cases ) , such downgrade attempt will conk out , even if you follow all of the above directions . After a fail downgrade , you ’ll likely have to restore back to Io 4.0 to get the iPhone working again . Such loser are more likely to hap with the iPhone 3GS than the 3 GB ( as Apple made changes in the fresh ironware design to forbid downgrades ) . If you reject to give up , there are method acting , requiring the economic consumption of additional software package and putting the iPhone into DFU mode , that might still allow a successful downgrade . How to do such a downgrade gets beyond the scope of this article ( but see this Macworld article for an example ) . In any case , if you are at all queasy about winding up with a failed restore , do not try any downgrades .
•Find your iBook purchase . One of the new features in iOS 4 is iPhone ( and iPod touching ) support for the iBooks app . However , after downloading and installing the app , you may find that books that you antecedently buy on your iPad do not show up in iBooks on your iPhone . Do n’t fret . The solvent is to connect your iPhone to iTunes and control the iPhone ’s Books tab key . Assuming your iPhone is connected to the same Mac that you apply to sync your iPad , your iPad - purchased book should be list . Select them and synchronise your iPhone .
If you are missing the purportedly pre - installed Winnie - the - Pooh book , Apple saysjust download a costless transcript from the iBookstore .
•Find the Hold button . In iOS 4 , the Hold clit for the Phone app was replace by the FaceTime push . What happened to the Hold release ? It ’s still there — hidden behind the Mute button . To access it , tap andholdthe Mute button ( instead of just tapping it ) .
•Manually quit apps to solve knack - ups . With the fresh multitasking feature article in iOS 4 , if you pass on and return to a support app , the app stay in the same state as you go out it . This is a convenient and sentence - redeem feature — eliminating the need to relaunch an app from scratch each time you return to it . However , it may occasionally precede to a job .
For case , suppose an app is stick at a certain covert — perhaps due to some glitch . The app is not frozen ; you’re able to still get at feature on the displayed concealment . It ’s just that you ca n’t figure out how to perish the screen . You set about to function - around the problem by weight-lift the abode button to resign the app . However , your work - around fail . Due to multitasking , you now deliver to the same stuck billet the next clock time you launch the app .
The solvent to this , and any exchangeable problems , is remove the app from the leaning of apps currently maintained for multitasking . To do this , twice - click the Home button to bring up the multitask bar . Now water tap - hold on the problem app until it begins to wiggle . Finally , rap on the minus badge that appears in the upper - left of the app ’s ikon . The next time you launch the app , it will launch from scratch and ( unless the stuck blind was the initial hone screen ) you will no longer be at the stuck spotlight .
•Enable Internet Tethering?With iOS 4 , AT&T has finally graced U.S. users with the alternative for net Tethering . To get at it , go to configurations - > General - > web and select Set Up net Tethering . After doing so , follow the instructions to contact AT&T.
But expect ! Before you do , turn over this : cyberspace Tetheringonly act upon with AT&T ’s 2 GB for $ 25 - per - month DataPro plan . If you currently have , and wish to preserve an unlimited $ 30 - per - calendar month architectural plan , you ca n’t enable Internet Tethering . In any case , enable tethering will set you back an extra $ 20 - per - month for nothing more than the perquisite of tethering ; no GB are added to your monthly allotment .
Overall , this is an atrocious insurance policy . That ’s why , if you do n’t perfectly require tethering , I would last out away from this feature article — at least until AT&T hopefully changes its policy . If you do need a tethering choice , consider alternative such asMiFi .
