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17

There is an Apple support document on how to do this. You don't need to keep a sim in the phone but you need to put one into it to activate it before taking it back out. Here's the procedure for 3G and 3GS: You can use any SIM card associated with the carrier that your device supports to activate the phone. Simply place a SIM card from the last ...


16

The circle indicates that you're on the cellular GPRS data network. The fact that it's visible also means that you don't have a wifi connection:


8

Yes, it does slow down. It's more and more noticeable as time goes by. Apple has acknowledged this issue and they are looking into it. Here are tips to make it run smoother again. (This is just a solution that has worked for many people. This is not Apple's official solution. They are working on a solution.) 1 - Disable spotlight search. Settings -> ...


8

It is not compatible. Bell's new network (shared with Telus) is a 3G HSPA overlay (on top of their existing CDMA network) which the iPhone 2G does not support.


7

The rumours are that it is much faster: http://thenextweb.com/apple/2010/07/27/does-ios4-1-fix-slow-iphone3g-units-yes/


6

You could make a silent ringtone your default, and then assign other custom ringtones to each of that certain set of numbers. See Apple's Purchasing and creating ringtones FAQ for a start.


6

Searching SMS messages was disabled due to battery life and performance concerns for the 3G, you can see this in the iPhone: Which iOS 4 software features does my iPhone support? article on apple.com http://support.apple.com/kb/HT4204 iPhone 3G does not support Spotlight search for SMS/MMS messages.


6

See iPhone 3GS - Technical Specifications: Cellular and wireless UMTS/HSDPA (850, 1900, 2100 MHz) GSM/EDGE (850, 900, 1800, 1900 MHz) 802.11b/g Wi-Fi Bluetooth 2.1 + EDR wireless technology From Wikipedia: In North America, GSM operates on the primary mobile communication bands 850 MHz and 1,900 MHz. In Canada, GSM-1900 is the primary band used in ...


5

In general, this is probably because one of, or a combination of the following reasons: 1. Outgoing mail server requires authentication To avoid abuse by spammers, many outgoing mail servers require authentication for relaying messages across the the internet. You should check if the outgoing mail server you are using for this account requires ...


5

You can't. AT&T and Sprint use incompatible technologies.


5

I don't know about the yellow alert symbol, but a quick google for "iphone recovery mode utility" revealed RecBoot, which looks like exactly what you're looking for. Also, Settings > General > Reset > Reset Network Settings should restart your iPhone.


4

The Nike iPhone Sport Kit only works on the iPhone 3GS and later. It won't work on the first iPhone or on the iPhone 3G.


4

The features you mentioned, "task manager & background wallpaper" are not available on the iPhone 3G. In order to have access to all the features of iOS 4 you need to have it installed on an iPhone 3GS or later.


4

Here's an article (and video) showing off the issues with iOS4 on a 3G: http://www.macrumors.com/2010/07/28/apple-looking-into-reports-of-problems-with-ios-4-on-iphone-3g/ Seems like not only is it extremely sluggish, but battery life is shortened as well. Apple has confirmed that there is an issue and are looking into it. I would hold off for now and wait ...


4

In my personal experience, iOS 4 was only marginally slower than iPhone OS 3, so it really comes down to features. First, iOS 4 does not allow you to put home screen wallpapers on an iPhone 3G. I don't have experience with multitasking on a jailbroken device, but again iOS does not provide this functionality on the iPhone 3G. However, given the memory and ...


4

4.2.1 is officially the latest supported version for the iPhone 3G, but you can supposedly install iOS 5 on it with this method: http://osxdaily.com/2012/01/19/install-ios-5-on-iphone-3g-with-whited00r-5/ In the video, it shows the Messages app on the homescreen, so that ought to work for you.


4

Note: This answer is no longer valid. (See @stuffe's answer on how to install apps onto old versions of iOS) The short answer is there is no way to install an app that was created for an iOS newer then the one you are running. You should connect the device to iTunes and see if you can get it updated to the latest 4.x iOS as many games and apps that ...


4

No ,you can't update the the iOS 4.2.1 to iOS 5 in iPhone 3g. The highest supporting operating system of iPhone 3g is iOS4.2.1.(Apple discontinued iPhone 3g on June 2010). If you need iOS 5 like features on your iPhone 3G, try Whitedoor(it may help you). Note: Whitedoor is just an iOS 3.1.3 so you won't be able to run your iOS 4.0-4.2.1 applications on ...


3

The final iOS rev for iPhone 3G is 4.2.1, and you could always save a backup before upgrading and restor to the 3.X version if 4.2.1 was too much of a hog. Hope this helps! Edit: This thread says its not even worth it. 4.2.1 is crippling to the device.


3

You could attempt to put the iPhone in DFU Mode, and see if you can restore from iTunes. But this is almost certainly a hardware problem, and will require a trip to an Apple Store or a service provider. To try DFU mode (note that this does a complete wipe, you'll have to rely on whatever backups you made previously): Plug the phone into your computer. ...


3

As of the time this question and most of the answers was posted, it was not possible, however it is now possible to do this on an iPhone 3g running iOS 4.2.1 though not iOS 3.1.2. Simply try to download any app, and if the current version is not compatible with your device or OS, and a suitable older version existed at some point in the past that was ...


3

This is by design, although the basic internal features and functions of iOS4 are present (this is mainly the stuff that apps will use, so you can be sure that if your app says it needs OS4, then you can run it) not all the OS functions are present, and this includes the background switching functionality as well as a few other things. I can't remember them ...


3

This is the same set of steps you would use if you had a sim card, it's more about clearing the account that device has registered with the iMessage service. Try to turn off iMessage completely, totally log out of the system in Settings > Messages. When you re-enable it, ensure you log in with your own Apple ID. At this point, you should be able to ...


3

The data being deleted is in reference to the data already stored on the phone (e.g. the sister's contacts). An iPhone can only be synced to one PC at a time, and if you want to setup syncing with this new PC, you will need to delete all of the data on the iPhone. If your wife wants her sister's contacts, then she shouldn't sync and wipe the data before she ...


3

I had the same problem before, when I replaced a cracked iPhone screen for a friend. When a 3GS digitalizer gets in contact with an iPhone 3G LCD they send the wrong signals to the motherboard(through ribbon cable 3) and then the graphic part of the motherboard brokes. So you will probably have to replace the whole motherboard, be more careful when buying ...


3

Simply turn off voicemail for calls to google voice using the web interface for that google voice number. If you activated the carrier settings like in the image below - click the instructions to reverse those changes with the carrier. You could also call your carrier for help since it's a feature that has different commands on a per-carrier basis. They ...



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