I accidently updated my 3gs to 3.1.3. how to I unlock it to use it with provider

One of the best method to unlock an iPhone 3GS is to unlock using remote unlocking service. You can get the remote unlocking service for an iPhone 3GS from www.wickedunlock.com/apple-iphone-3gs/rs16wp9/ at affordable cost. This method of unlocking is very simple. Here are the steps for unlocking an iPhone 3GS,
1. Wait for us to send you an email saying your phone has been activated or remotely unlocked.
2. Install the latest version of iTunes.
3. Make sure your Apple iPhone 3GS phone software is updated to the latest version using the iTunes software.
4. Connect your Apple iPhone 3GS to iTunes with a NOT ACCEPTED SIM card.
5. Wait until iTunes detects your Apple iPhone 3GS.
6. Disconnect your Apple iPhone 3GS and reconnect it after 10 seconds.
7. Your Apple iPhone 3GS is now unlocked.

This method of unlocking doesn't require a jailbreak too. Anyway if you need to jailbreak your iPhone 3GS, You can get the guide from www.absinthejailbreak.com All the best mate.

Yes, You need to unlock your AT&T iPhone 3GS to use with T-Mobile. You can unlock your iPhone 3GS safer and easier through remote unlocking method. You can get the remote unlocking for an iPhone 3GS from www.unlocking4u.com/apple-iphone-3gs/rs6wp9/ at affordable cost. This site is a legit source to rely on accurate unlocking solutions.
Here are the steps for unlocking an iPhone 3GS through remote unlocking method,
1. Wait for us to send you an email saying your phone has been activated or remotely unlocked.
2. Install the latest version of iTunes.
3. Make sure your Apple iPhone 3GS phone software is updated to the latest version using the iTunes software.
4. Connect your Apple iPhone 3GS to iTunes with a NOT ACCEPTED SIM card.
5. Wait until iTunes detects your Apple iPhone 3GS.
6. Disconnect your Apple iPhone 3GS and reconnect it after 10 seconds.
7. Your Apple iPhone 3GS is now unlocked.

Hi, You can unlock your iPhone 3GS safer and easier through remote unlocking method. You can get the remote unlocking for an iPhone 3GS from www.unlocking4u.com/apple-iphone-3gs/rs6wp9/ at affordable cost. This process of unlocking is very simple.
Here are the steps for unlocking an iPhone 3GS through remote unlocking method,
1. Wait for us to send you an email saying your phone has been activated or remotely unlocked.
2. Install the latest version of iTunes.
3. Make sure your Apple iPhone 3GS phone software is updated to the latest version using the iTunes software.
4. Connect your Apple iPhone 3GS to iTunes with a NOT ACCEPTED SIM card.
5. Wait until iTunes detects your Apple iPhone 3GS.
6. Disconnect your Apple iPhone 3GS and reconnect it after 10 seconds.
7. Your Apple iPhone 3GS is now unlocked.

No free unlock codes for device. If device is no longer being subsidized, call AT&T or service provider and request an unlock code. They are obligated by law to provide it.

you can unlock your iphone 3gs using remote unlocking service. there are many providers like Mobile-Unlocker.com out there who provides this service.

there are many software available to unlock iphone 3gs and my friend unlocked it by remote unlocking..there are many online providers who provide the service..one of my friend got unlocked his iphone 3gs from Mobileunlocksolutions by remote unlock..and here is the instructions

1. Wait for an email saying your phone has been activated or remotely unlocked.

2. Install the latest version of iTunes.

3. Make sure your Apple iPhone phone software is updated to the latest version

using the iTunes software.

4. Connect your Apple iPhone to iTunes with a NOT ACCEPTED SIM card.

5. Wait until iTunes detects your Apple iPhone.

6. Disconnect your Apple iPhone and reconnect it after 10 seconds.

7. Your Apple iPhone is now unlocked.

and the important thing remote unlocking is available for some country and network providers only so if you are interested you can try from them before that see whether remote unlocking is available for your country and provider..

you can unlock your iphone..there are many software available to unlock iphone and my friend unlocked it by remote unlocking..there are many online providers who provide the service..one of my friend got unlocked his iphone from Wickedunlock by remote unlock..and here is the instructions
1. Wait for an email saying your phone has been activated or remotely unlocked.
2. Install the latest version of iTunes.
3. Make sure your Apple iPhone phone software is updated to the latest version
using the iTunes software.
4. Connect your Apple iPhone to iTunes with a NOT ACCEPTED SIM card.
5. Wait until iTunes detects your Apple iPhone.
6. Disconnect your Apple iPhone and reconnect it after 10 seconds.
7. Your Apple iPhone is now unlocked.
and the important thing remote unlocking is available for some country and network providers only so if you are interested you can try from them before that see whether remote unlocking is available for your country and provider..

You mean you updated the firmware and now the phone is locked?
Can you provide more information on the model and firmware of your iPhone?
All you have to do is jailbreak then unlock so you can use it with your current carrier.

See this matrix along with the tutorials on how to unlock your phone. Let me know if you need additional help..

http://www.jailbreakmatrix.com/iPhone-iTouch-Jailbreak