did it all , put my old card into my old phone and called a number waited for it to get the service back and put it back in the iphone 3g got t-mobile right away . pretty good way to get the service instead of turning it off on off on airplane mode..BUT i can get call , text and send text but i cant call lose service right away anyone got anything on that .?

mine shows no bars and invalid sim... did i miss a step? oh and btw,.its a honolulu number

I have the EXACT same problem. And a lot of people on the dev team blog are reporting the exact same problem with Tmobile. It must be a bug with yellowsn0w. Let's hope they work it out. Otherwise I'm going to have to downgrade back to 2.1 and use my universal sim again.

mine says no service...

Originally Posted by born2win413

mine says no service...

Follow these instructions:

First I went to connected my iPhone 3G to my computer and restored it with iTunes.
• Now my baseband is 02.28.00. ( Settings->General->About )
• Then I went to Cydia. ( Let it do its thing when your running Cydia for the first time. Restart Cydia. )
• Go back to Cydia if it restarted and update Cydia. (It will prompt you to update essentials when Cydia starts.)
• Now in Cydia, go to the bottom and click Manage->Sources->Edit->Add
• In the pop-up that came up, type http://apt9.yellowsn0w.com/
• Press "Add Source" and click "Done"
• Under "Entered by User", click the yellowsn0w source
• You should see "yellowsn0w", click it and then click install.
• After thats finished installing, exit out of cydia and go to Settings->General->Network
• Where it says "Enable 3G", put it to "OFF"
• Go to the home screen, hold the power button, slide to power off
• Now click the power button to turn your iphone back on.
• Once its back on, wait about 10-15 seconds
• If your it doesn't show your bars and the T-Moblie logo at the top left in 10-15 seconds, do this:
• Go to Settings and turn "ON" "Airplane Mode"
• Go to your home screen, turn on safari or cydia (I turned on cydia) and wait for about 10 seconds.
• Go back to Settings and turn off "Airplane Mode".
• Now at the top left it should say "Searching"
• After a few seconds, your bars will show up and it will show the T-Mobile logo.

Originally Posted by DenS

did it all...but I cant call. lose service right away. anyone got anything on that .?

T-Mobile does NOT work for Calling-Out!

I followed these instructions exactly. I even get the "Phone activated" message with the T-Mobile SIM.

http://www.coderetard.com/2009/01/01...re-yellowsn0w/


The "T-Mobile" logo shows and the full-signal strength, but the moment you enter a phone number and call-out, the signal goes completely Nil. After cancelling the call, the phone seems to restore the signal after about 30 seconds. But to no avail, the phone is unable to call-out.

The other functions like EDGE and WiFi seem to work.

I got it working on T-Mobile USA no problem, just followed the directions on the dev team blog. It did not work the first time so uninstalled it then reinstalled it and it worked. I just have to eject the sim card after every boot.

Originally Posted by ptpuffers

I got it working on T-Mobile USA no problem, just followed the directions on the dev team blog. It did not work the first time so uninstalled it then reinstalled it and it worked. I just have to eject the sim card after every boot.

are you sure you can make outgoing calls? I can get my phone to gain sinal by reinserting the sim but eveything works except outgoing calls.

dont even get t-mobile and no signal, i tried these steps and says invalid sim..

no signal nothing with t-mobile usa. i am not use gevey-sim. i have garbage right now.