HT4623 how can i switch my iphone 3gs at&t to t-mobile?

i am a t-mobile customer, i had a tmobile network phone, it broke, so i bought a iphone 3gs and its at&t, how do i switch it to tmobile?

You would have to contact AT&T. They are the only folks (as the original cellular carrier of the iPhone) that could possibly unlock it.

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HT4623 How can i update my iphone 3gs from ios 4.2.1 to ios 6.1

Already tried to sync with itunes and was advised when selecting check for update that current ios is 4.2.1. ios 5 or higher is needed for most apps on app store.

Read the article from which the question was posted and follow the directions.
Identifying iPhone models

HT4623 please help!! how can i configure my iphone 3gs because i've been updated a new version i did it but it's hard to activate it again.

please help!! how can i configure my iphone 3gs because i've been updated a new version, i did it but it's hard to activate it again. this message i always recieved in my iphone
"We're sorry, we are unable to continue with your activation at this time."

You phone was hacked. You can not get help with it here. Hacking / Jailbreaking voids any warraty and forfeits your right to support. Discussing jailbroken / hacked devices is forbidden by the terms of service here.

HT1414 how can i activate my iphone 3gs after upgrading to ios6? it could not activate....

how can i activate my iphone 3gs after upgrading to ios6? it could not activate....

If your phone was previously hacked to unlock it, when you updated the hack was removed and it's re-locked to the original carrier. The phone will now activate and operate only with that original carrier.

How can I update my iPhone 3gs to iOS4, after iOS5 came out?

I am still running iOS 3 (1.3) on my iPhone 3GS and I'm happy with it - but all the new apps requires iOS4 and now I'm sick of this. I want iOS4 (and not iOS5, cause it will drain my battery as far as I've understood).
How can I update my iPhone 3GS in a normal way to iOS4, through iTunes or another easy way? I have never jailbreaked an iPhone so I don't know too much about "backdoors" into my iPhone.

The only Firmware in the iOS 4 series that Apple is still signing for the iPhone 3GS is 4.1. So you could restore to 4.1. You will have to download the 4.1 IPSW from Apple, and then install it with iTunes, Option Click Mac or Shift Click Windoz, on the Restore Button and then select the 4.1 IPSW on your computer. The current iTunes may give meaningless Errors, I doubt because you are Upgrading. But if Error Message is given you will have to search the Web for ways to Exit Recovery.

How can I recognized an iPhone 3GS on iTunes 11.0.4.4 version on PC Windows XP Professional with Service Pack 3?

How can I recognized an iPhone 3GS on iTunes 11.0.4.4 version on PC Windows XP Professional with Service Pack 3?

Plug the device into the computer and iTunes will detect it. If that is not working, then stating as such would be a good start.

How can i get an iphone 3gs unlocked to any network?

how can i get an iphone 3gs unlocked to any network?

Only the cell carrier to whom the iPhone is locked can authorize an unlock, so you will need to contact the carrier. Note that if the iPhone is locked to AT&T, they will not unlock an iPhone at any time for any reason.
Regards.
Forum Tip: Since you're new here, you've probably not discovered the Search feature available on every Communities page, but next time, it might save you time (and everyone else from having to answer the same question multiple times) if you search a couple of ways for a topic, both in the relevant forums and in the Apple Knowledge Base, before you post a question.

How can i unlock my iphone 3gs for international ?

how can i unlock my iphone 3gs for international ? it san emergency im leaving the country now!

Contact the carrier to whom it is locked and ask if they offer this service and if your qualify.

How can i fix my iphone 3gs, could not activate after restore

how can i fix my iphone 3gs, always appear, could not activate after restore

When you say activate what do you see?

HT4623 I can't activate my iphone 3GS , how can I do it ?

I can't activate my iphone 3GS , how can I do it ?

Has your iphone been hacked/jailbroken/unofficially unlocked?
This is generally the cause for this issue

HT4623 how do i update my iphone 3gs as it keeps saying that 4.2.1 is the right update which its not

how do i update my iphone 3gs as its got 4.2.1 and its saying that it is the right updatee but its not

To expand on the 1/2-answer that Diesel gave;
The first thing you should look into is which version of iTunes you have. If you're not running iTunes 10, then you're not going to be able to update your phone past iOS 4.2.
Depending on what kind of system you're using, there are several reasons why your iTunes may be out of date:
In the Mac world, if you're not running a version of OS/X newer than 10.5.x (Leopard) then iTunes won't upgrade to the latest version (10). If you have a pre-2006 G-series processor Mac, you're pretty-much stuck at 10.4.x (Tiger) or lower and, sadly, Apple/iTunes doesn't support those machines any more. If your Mac is newer than 2006 but older than 2008, you'll likely be stuck at finding a copy of Snow Leopard (10.6.x) and you need to see your local Apple service provider to see if they can get you updated.
If you're running a Windows workstation, I believe that any Windows machine that's still running XP patched to Service Pack 2 or later should still be able to install and use iTunes 10. The system requirements can be found on the iTunes download page. If for some reason your iTunes has stopped doing its updates (or won't do them) you'll probably need to re-install iTunes. Installing over-top of the old iTunes should work and you won't loose any of your data - however, just in case, you should back-up your computer prior to making any significant changes to the software.
Now, Diesel also made the assumption that you may only have a 3G phone and not a 3Gs. To verify this not the case, plus for anyone who may be reading this and has any doubt, this link will help you identify your phone. iOS 5 and later does not support phones older than the 3Gs, and its unlikely that your cellular service provider will for very long either.
Good luck.

HT4623 How can I update my iphone 4 from iOS 5.1.1 to iOS 6.1.4 only. I am not looking for iOS 7 right now. Please suggest the update process?

Hi Team,
I have iphone4 16GB with iOS 5.1.1. While using the phone, few times the phone is automatically going to shutdown and getting call disconnected. Some times, it happens more frequently in a day, sometimes not.
and also, How can I update my iphone 4 from iOS 5.1.1 to iOS 6.1.4 only. I am not looking for iOS 7 right now. Please suggest the update process?

You cannot. You can only upgrade to the currently supported version of the iOS which, at this time is iOS 7.0.2.

HT4623 How to copy contacts from iPhone 3gs to iphone 4.

How to copy contacts from iPhone 3gs to iphone 4.

First youll need to back up all your contacts to you computer, then sync your new iphone and be sure to tick the boxes to sync all you contacs. Also if your iphone 3 has icloud, back them up to icloud, and then restore your new iphone from a icloud backup, No computer needed

HT4623 how can i update my iphone 4 that does not have the update option in the settings?

How can i update my iphone 4 that does not have the update option in the settings?

From the article you linked, scroll down to the section "Update your device using iTunes"

HT4623 how can i lock my iphone

how can i lock my iphone so no one can ge in it

i dont have my iphone with me and i forgot find my iphone password

HT4623 how can i switch my iphone 3gs at&t to t-mobile?

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