Woot... got my iPhone3g working.. so far so good..  

Method #1 (props to reda92 at youtube)
Quote:
1. Install yellowsn0w thru cydia, keep your Third-Party Sim in the iphone
2. Reset Network Setting "Most important" 99% success rate will depend on this. (LF: you can find this in settings - general and to the bottom you'll see a "reset" menu in which you can find this)
3. Reboot your inphone
4. Wait a little over a min.
5. Remove your sim card and re-insert it back in
6. Wait 30 sec.
7. Turn on Airplane mode and wait 10 sec. "This is important as well"
8. Turn of Airplane mode, you should see "searching" start smiling T-Mobile carrier will start appearing.
9. Start make call!
a slightly different method for this worked for me the 2nd time.
differences were: I had everything like 3G, edge, wifi, and ssh off through sbsettings, I didn't pop out my sim, and at step 4 I didn't unlock the unlock screen but let it wait at it for 1-2 minutes


Method #2 Another and props to admin at mobiletechaddicts site:
Quote:
Ok I followed the instruction given and I could not
admin | January 1, 2009

Ok I followed the instruction given and I could not get it to work, then I followed these instructions and everything worked perfectly and my iPhone 3G was running on vodafone, no signal drops, perfect, so if you are having problems follow this procedure:-

1. Download and install BossPrefs and Yellowsn0w via Cydia
2. Disable all Functions with BossPrefs (don´t worry if you can´t disable EDGE)
3. Reboot your Phone with BossPrefs (not in the normally way - important !)
4. Wait 1.30 min when you see the Lockscreen
5. Take out your Sim and insert it.
6. Wait a moment
7. Go on Settings and Turn on the flight mode
8. Turn off Flight Mode
9. All should now be unlocked
Basically another variation of the above method.

Method #3: (props to a user at the devteam blog comments)
Quote:
Please try out this :
1. Download and install BossPrefs and Yellowsn0w via Cydia
2. Disable all Functions with BossPrefs (don´t worry if you can´t disable EDGE)
3. Reboot ypur Phone with BossPrefs (not in the normally way - important !)
4. Wait 1.30 min when you see the Lockscreen
5. Take out your Sim and insert it.
6. Wait a moment
7. Go on Settings and Turn on the fly mode
8. Turn off Fly Mode
9. take out t-mobile sims
10.put in at&t sims for 1minute
11. take out AT&T sims card
12. put in T-mobile Sims
13. USA t-mobile are you HAPPY !!!!

last, method #4 for now (props to Deli_gt at hackint0sh):

Quote:
f done exactly as told it works for most of the user.

1. recover your iphone to 2.2 with bb 2.28.00 affter ready close itunes dont sync, activate or nothing just close it!!!

2. quickpwn it with installer and cydia installed

3. when phone is ready connect to wifi,got to cydia, when opend for the first time ignore the update for cydia
and install first mobileterminal and affter sbsettings from cydia.

4. turn off data roaming and 3g connection from settings !!!!!

5. install yellowsn0w from installer affter adding the source yellowsn0w.com offcource

5. slide ur finger from top left to right on the screen to get sbsettings open

6. press power button from sbsettings and from the popup restart button.

7. when phone is reset wait for 20-30 secs and go to mobile terminal

8.
Go to terminal
type yellowsn0w -c
type yellowsn0w -q
airplane mode on
airplane mode off

if you get "open: Recource busy" just repeat the command where you got it from.
if command yellowsn0w -q keeps loading for more than 20sec and your terminal looks similar to pics from Flickr: deli_gt's Photostream move to next step.

9. Go to setting turn airplane mode on wait 10 secs and it should start searching for the network, it shold find the network and everything should be ok.

If not
if it still show the four dots for the signal repeat the steps 8 and 9 but first exit mobile terminal totaly by holding down the home button until it closes totaly
if that doesnt work eather use
compination

go to terminal
type yellowsn0w -c
type yellowsn0w -r
type yellowsn0w -q
airplane mode on
airplane mode off .

That's how you get it working for 99% sure. i tried it in 3 diferent iphones one from finland one from germany and one from UK. UK and german wasnt workin in the first.
Until now many has goten it to work only by this method.

UPDATE.
I can confirm I got it allso to work with out sbsettings reset, just usual phone on and phone off.

UPDATE.
So only thing you have to actualy do is to install yellowsn0w from installer not from cydia. And after every time the phone boots wait 30 secs and make the commands with mobile terminal(step 8)-> and airplane on off, if doesnt work repeat the step 8 and again airplane on off.

UPDATE.
If you lose network use this compination and you'll get network back without reseting the phone

go to terminal
type yellowsn0w -c
type yellowsn0w -r
type yellowsn0w -q
airplane mode on
airplane mode off

I think its good idea to have a poll whereby how many users managed to unlock the iPhone 3G on their Celcom, Digi or Maxis etc...

I have the same idea with you but was complained by others. Thats y i closed it:-)

NAMES of SUCCESSFUL UNLOCK
1.
2.
3.
.
.

NAMES of UNSUCCESSFUL UNLOCK
1.
2.
3.
.
.

Otherwise, its good if we can list down the NAMES of the people who have managed to unlock it and those who don't. At least, we will get to know these people and asked them their experience.

NAMES of SUCCESSFUL UNLOCK - List User/Telco/iPhone country model
1.
2.
3.
.
.

NAMES of UNSUCCESSFUL UNLOCK - List also what doesn't work..?
1.
2.
3.
.
.

I think its good idea to have a poll whereby how many users managed to unlock the iPhone 3G on their Celcom, Digi or Maxis etc...

I have the same idea with you but was complained by others. Thats y i closed it:-)

NAMES of SUCCESSFUL UNLOCK - List User/Telco/iPhone country model
1. rjmm2 / Celcom
2.
3.
.
.

NAMES of UNSUCCESSFUL UNLOCK - List also what doesn't work..?
1.
2.
3.
.
.

Not yet.. I have been reading the Dev Team blog and hackintosh since the day they released the Yellowsn0w. It seems there's a lot of problems.
I'm using a Turbosim solution and this is my only phone now. I'm quite worried, after I upgrade and if its not successful, I will be left with an expensive iPod Touch.

Currently, it seems US simcards have more problems as compared to the rest of the world. Not sure about Malaysia...coz it seems some of us here are facing similar problems too.

I have to make sure there is a stable solution before I make a move.
Is this too much to ask?

Update: OK - Thanks TripleH for putting the names of the Successful ones in your front page.

if its not too much to ask
my iphone is sync with my imac, if i pawn it using my mbp, will there be any issue?
as there is no restoring data in itunes in the mbp