all methods i try end up giving me "sim failure" message and "invalid SIM" in the bars section... (top left corner)

any idea how to fix it?

solved by resetting once using SBSettings...

Excellent job mon!!!

Method #3 (Mine):

1. install itunes 8 if not available and reboot pc.
2. put Sim in the phone and update to 2.2.0 firmware using iTunes and close iTunes.
3. using Quickpwn 2.2 select the same firmware to jailbreak.
4. disconnect phone from pc.
5. install sbsettings using wifi. (sbsettings is better than bosspref)
6. go to installer add source of http://i.yellowsn0w.com
7. now u see yellowsn0w 0.9.4 or search to find and install
8. bring sbsettings disable all functions except phone. (3g, bluetooth, EDGE, Wifi shoud be red and Phone will be green in color.)
9. reboot using sbsettings.
10. unlock the screen after 1 min.
11. Take out your Sim and insert it and dont touch the screen.
12. wait for exactly 5/6 min

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If neither of these tricks work, again, you should definitely hit up the Yellowsn0w report and see how other people have gotten their iPhones to unlock on the various carriers. It beats searching through pages and pages of forum posts, trust us!
Give a detailed report to DEV-Team http://report.yellowsn0w.com/submit.php[/QUOTE]

do we have to do all this procedure everytime we change sim card?

no just every time you reboot

Originally Posted by tamz273

solved by resetting once using SBSettings...

Can you explain exactly what you did? Because I have the same problem: Invalid SIM.

Originally Posted by sskzk

Method #1 (from Youtube's reda92)

Method #3 (Mine):

1. install itunes 8 if not available and reboot pc.
2. put Sim in the phone and update to 2.2.0 firmware using iTunes and close iTunes.
3. using Quickpwn 2.2 select the same firmware to jailbreak.
4. disconnect phone from pc.
5. install sbsettings using wifi. (sbsettings is better than bosspref)
6. go to installer add source of http://i.yellowsn0w.com
7. now u see yellowsn0w 0.9.4 or search to find and install
8. bring sbsettings disable all functions except phone. (3g, bluetooth, EDGE, Wifi shoud be red and Phone will be green in color.)
9. reboot using sbsettings.
10. unlock the screen after 1 min.
11. Take out your Sim and insert it and dont touch the screen.
12. wait for exactly 5/6 min

http://report.yellowsn0w.com/submit.php

Method three worked for me. the thing is that every time i Let pwnage tool or quickpwn do the activating, i get no signal or carrier.
So, thinking in that mindset, Letting YellowSn0w be the "activator" or getting the baseband to act, was my best bet.
Its been working for a day, i am satisfied.

First method worked for me, only been going for 10 mins but so happy after i updated and thought i'd blown it. Will report back in 24 hours if still ok as i'll be going in and out of service a lot

On Vodafone UK by the way

on yellows0w -q i get an error about works on baseband 2.28.00 and says my baseband is ""

1. Restore to Firmware 2.2
2. Download QuickPwn
3. Jailbreak your phone
4. Go to Cydia, Add the Repository ("http://apt9.yellowsn0w.com/")
You can do this by going to Manage > Sources > Edit > Add.
You need either Wi-Fi/EDGE for the step onwards, ofcourse.
5. Search for "yellowsn0w" in the Search tab in Cydia. Download and Install.
6. Search for "BossPrefs". Download and Install.
7. Close Cydia. Open BossPrefs, restart your iPhone using the BossPrefs Restart option. (BossPrefs > Power > Reboot)
8. Wait for your phone to boot up, again open up Cydia, and reboot using BossPrefs again.
9. Wait for your phone to boot up, you should see Signal appearing. Test calls/sms/data, etc.
10. If for whatever reason, you dont get signal. Remove your SIM, put in back in.
11. Wait 1.5 minutes, Enable Airplane Mode, Wait 10 Seconds, Disable Airplane Mode.
12. You should see Signal appearing. If not, your outta luck! (Try one more BossPrefs Reboot)

A method that has always worked for me.
Video @ the source too.
http://www.erodov.com/forums/unlock-...ial/15546.html