Question about T-Mobile Sidekick® 3 Cellular Phone

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HOW DO I USE MY ATT SIM CARD IN MY SIDEKICK - T-Mobile Sidekick® 3 Cellular Phone

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  • Anonymous Apr 05, 2009

    Tmobile told me that they don't support AT&T when I asked for help. They'll only help you if you're a Tmobile customer.

  • Anonymous May 08, 2009

    My friend is giving me her old Sidekick for free. but I cant affored to cancel my ATT service and switch over. I just want to be able to text and call mainly.

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  • 57 Answers

Go to tmobile and have the phone unlocked

Posted on Jan 07, 2009

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I just got an unlocked sidekick lx 2009 and put in my att sim card. I can make calls but it is not reading my contacts. what do i do?


More than likely your contacts are still located in the old phone. Replace the Sim card back into the old phone and copy the contacts onto the Sim card, place back in your Sidekick and you then can locate your contacts.

Mar 11, 2011 | T-Mobile Sidekick ID Cellular Phone

1 Answer

Tmobile sidekick will not activate


try pressing menu (the three bars) and L at the same time. i had an at&t sim card too and that worked.

Aug 22, 2009 | T-Mobile Sidekick® 3 Cellular Phone

1 Answer

Sidekick 3 Dont Connect (No Internet neither send messages)


So an unlocked Sidekick on ATT will only be able to do text and phone. The other sidekick features require the t-mobiles sidekick data plan. It is hard coded to the phone

Aug 09, 2009 | T-Mobile Sidekick® 3 Cellular Phone

1 Answer

I got a sidekick 3 from a friend i have an att sim card but the phone is locked


Your going to have to call customer service. Thats what my dad did and they unlocked his phone. (:

Mar 03, 2009 | T-Mobile Sidekick® 3 Cellular Phone

1 Answer

Loading problem?


no that isnt what it should do .
Right when you turn on the phone with
your at&t sim card it should ask for an
unlock code.

Feb 28, 2009 | T-Mobile Sidekick® 3 Cellular Phone

1 Answer

Unlock Sidekick ID


I found this guide online.
Please let me know if this works!

"1) Insert the ATT SIM card into the back of the T-Mobile Sidekick ID (it should be located behind the battery).

2) Turn on the Sidekick ID, wait for the screens to load.

3) When the screen says "Waiting for Activation", hold the top left button (the "Menu" button with the three lines) on the Sidekick ID and hold the letter "L" on the QWERTY pad at the same time. After a few seconds, let go of the buttons.

4) If Step 3 is done correctly, the Sidekick should be directed to the jumpscreen and display all of the Menu's of the Sidekick ID.

Jul 13, 2008 | T-Mobile Sidekick ID Cellular Phone

2 Answers

Sidekick 3


1. Insert your non-TMobile sim card 2. The phone display says "Enter the code". 3. On your Sidkick, press the "X" button. 4. You will see the menu. 5. Choose the left-up angle button. 6. Choose "setting"--->"network"--->"scan and select manually". 7. The phone will search for your network. 8. When your Sidekick finds your network, you can use the phone to make calls

with other sim cards you cant use data services...t-mobile uses different type of connection from other companies

Jan 31, 2008 | T-Mobile Sidekick® 3 Cellular Phone

10 Answers

Installing sim card in sidekick II


hello, hope these instructions help: 1. To expose the SIM card slot, peel back the bumper from the top-left edge of the device. (fig 1) 2. Insert the SIM into the slot with the gold contacts facing forward and the cut corner facing out. (fig 2) 3. When you release the SIM, make sure it is locked into position behind the catch so it will not spring out. 4. Replace the bumper and turn on the device. Any problems, let me know :) Si

Oct 03, 2007 | T-Mobile Sidekick ID Cellular Phone

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