sim unlocking a G1

[ link: sim-unlocking-g1 | tags: android g1 | updated: Thu, 20 Aug 2009 22:14:33 ]

One of the phones I picked up on eBay was SIM-locked (see my previous post) and I had to go through the process of unlocking it so I could use it on my local cell network.

WARNING: It worked for me, but it may not for you. This may very well brick your phone! In some cases you will only have 3 chances (in others 10) to unlock, failing to do so can damage your SIM card or the phone.

Still here? Let's get started...

You will need the following:

  • sim-locked T-mobile G1 (aka HTC Dream) with a fully charged battery.
  • T-mobile SIM-card (no actual plan is required).
  • your SIM-card with data plan.
    • if the SIM-card is locked, you will need the PIN to unlock it.
  • a Pay Pal account.
    • you will be charged $23.99 USD.
  • a gmail account.

I used the guide provided by www.unlock-tmobileg1.com, but found some omissions. Please read their guide, review this post, and my notes for best results :)

Here are the steps I followed:

  • downgrade firmware to RC23

    I had tried to unlock the phone with the firmware that was on the phone, but I was unable to add my APN to the list. I think it only accepted the MCC/MNC numbers that T-Mobile uses. Adding the APN is essential to actually use the phone off a T-Mobile network... so this is an important feature.

    Downgrade instructions can be obtained from here. But don't follow all the steps, just stop at RC29.

  • obtain IMEI code

    After booting the phone with the T-Mobile SIM card, press the EMERGENCY CALL button and enter *#06#. Write down the IMEI. Confirm that it's the same number that's written on a sticker under the battery.

  • obtain unlock code

    Go to the www.unlock-googlephone.com site and follow their ordering instructions. Make sure you type in everything correctly.

  • add APN for your network

    Using either SIM-card, boot the phone and add your APN info. This is done by pushing the MENU button to enter the APN settings, and then the MENU button again to add a new entry.

    You'll have to search around to find out what your provider uses, or extract the data from another phone.

    As outlined in my previous posts, I am on a Rogers network... so I added the Rogers APN.

  • SIM-unlock the phone

    After a few hours, you will receive a your code is ready email from www.unlock-googlephone.com. The email will send you to their website and you will get your unlock code. You may want to write down the number for your records.

    Using your SIM-card (with data plan) boot the phone.

    You will be asked for SIM network unlock PIN. Enter the number they gave you. Be very careful.

  • register the phone with google

    This last step will connect your phone with your gmail account.

Here are some additional resources:

Bart's Blog

/sim-unlocking-g1

About

I am an embedded Linux software developer and consultant operating under Jukie Networks Inc in Ottawa, Canada.

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first post!





Bart Trojanowski
http://www.jukie.net/~bart
bart@jukie.net