How to unlock AT&T Dell Streak and use it on T-Mobile

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Good news, T-Mobile customers. The AT&T Dell Streak can now be unlocked in a matter of seconds with the Rebel Sim II. I had tried many, many times to unlock the Streak with this card in the past, but what made it work this time is the firmware.

Version 1.2 of the firmware was released two weeks ago, and I can confirm that it is able to unlock the AT&T-locked Streak for use with T-Mobile (voice and EDGE). The Rebel Sim II does not void your warranty because it doesn’t modify any software orpermanently unlock the device; once you remove the card, the Streak is back to its AT&T-only state. Put it back in with your T-Mobile SIM, and it’s unlocked for T-Mobile again. Take it out and your Streak is locked to AT&T.

Want to use your official AT&T Streak with T-Mobile (and other carriers)? Here’s how to do it.

1. Buy the Rebel Sim II or You can buy it with the SIM cutter too if you want,

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2. Punch a hole at the top of your T-Mobile SIM card. It doesn’t affect the card’s usability (you’re just punching through useless plastic) and the hole doesn’t have to be precise.

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All you need to do is make sure the black square on the Rebel Sim II is exposed when the cards are stacked. That little chip is the source of the magic.

Here’s a more technical explanation:

“The Rebel Simcard has an IC on the FPCB and this intercepts some of the communication between the network simcard and phone and enables the use of other network simcard’s in a otherwise locked phone.”

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3. Slide the stacked cards into the Streak’s standard SIM slot. They won’t stay together very well on their own, so you can use a small piece of tape on the edge if you can’t get them in correctly. There’s very little room for imperfection when inserting the cards (i.e., they really need to be lined up correctly for this to work), so be patient and keep trying.

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4. Once the two cards are inserted, put the Streak’s battery back in, replace the back cover, and turn it on. If the cards are in correctly, you’ll see T-Mobile in the status bar as soon as the Streak boots up and prepares the SD card. If you don’t see it, take the cards out and try again.

And that’s it.

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I’ve got Android 2.1 on my official AT&T Streak, and it works with no problems on T-Mobile.

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After I removed the Rebel Sim II and T-Mobile SIM card, I put my AT&T card back in and it was like nothing had happened.

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I’m back on AT&T and fully locked to the carrier until the next time my Rebel Sim II wants to take a ride in the Dell Streak.

If you already have a Rebel Sim II card with the old firmware, you can download the new firmware and load it onto the card with a compact programmer.

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12 Responses to How to unlock AT&T Dell Streak and use it on T-Mobile or any other network

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  2. cody says:

    Are there any limitations noticed between ATT and TMO? What about upload/download speeds? Noticeable? I am thinking about getting one, just hate ATT with a passion.

    • admin says:

      USA t mobile 3G frequency is not the same as the one the AT&T uses and the Dell Streak in the USA can support on 2G with EDGE or GPRS for now.

      The Rebel simcard II v1.2 however allows users to use 3G networks full for firmware version V1.6 and V2.1 Android OS for Streak where networks support the frequency to use 3G functions. All the Uk networks can allow use of 3G with the mentioned firmwares on the Dell Streak on any network.

  3. Back in June 2010 We unlocked the first Dell Streak Using Rebel Simcard and Then in September 2010 Using our Own In House Code Reading Software.
    Now We have Created New solution For Dell Streak allowing your to use our Unlock code Reader Server via Client Software from the comfort of your home.
    As you know the Rebel simcard II V1.2 Allows full use of the Dell Streak in 2G/3G mode with full network Renewal functions for Android OS V1.6 & V2.1.
    Now this New Remote Dell Streak Unlock code Reader Compliments our Existing Range of Dell Streak & Dell Aero Mini 3 Unlock solutions.

  4. […] in June 2010 We unlocked the first Dell Streak Using Rebel Simcard and Then inSeptember 2010 Using our Own In […]

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