For those interested to buy the world's first Android mobile phone outside US/UK, read these.

At the time of writing (May 2009, updated on November 2009), the HTC Dream G1 is already released in many countries, including Australia. Even the replacement model HTC Magic G2 and Hero is out as well. For those budget strapped people out there who are considering to buy an Android phone to use or Android development, there isn't a better time to buy the HTC G1.

Why buy HTC G1?

Because it has been out long enough that almost everything about the HTC Dream G1 is known.

1. Thousands of compatible applications are currently available on Android market for free or paid.
2. Many custom firmwares are available on the internet, with complete installation instructions.
3. The latest and greatest cupcake release (Android 1.5) is available that have onscreen keyboard, video recording, widget support, bluetooth A2DP & AVCRP profiles and other updates. JF1.50 Screenshots available here.
4. Price of HTC G1 have dropped from US$400 since release. Most US ebay store now offers brand new or near new HTC G1 around US$300, way cheaper than Optus Australia's AU$1029 outright price. Current price for HTC Magic G2 is over US$600!!!!
5. HTC Magic G2 does NOT have full keyboard and I personally find the onscreen keyboard hard to use.
6. ADP1 has been out of stock and your only alternative is to buy a standard G1, root it and transform it into a ADP1.

First time turning on your US/UK G1

Right, so maybe you have listened to our advice and obtained a G1 from US or UK. Here is you may need to do.

1. Well, if you try to put in any sim card, and it prompt for unlock code, you have purchased a unit that is sim locked to T-mobile, you would need to buy an unlock code. Cheapest unlock code can be purchased from ebay, such as this store at US$13. (We have tried them and their unlock code does work.) Note that other web sites may sell the code at US$30, so be sure to shop around. What you need to provide them is the phone model (HTC G1), and the IMEI number hidden behind the battery at the back of unit.
2. Then, you will see prompt for activation which involve signing in your google account. You must use a sim card that have data plan (though there is an alternative using WIFI here)
3. Before signing in, you need to input your APN details, otherwise, it simply can't connect to the internet. When you get to the details screen for your account, press "Menu", then add APN. Type in your carriers name, username & password (if any), input APN, MCC and MNC. You can find APN details for your carrier here.

Next, you would want to install a custom firmware instead of using the T-mobile version.

Why use custom firmware?

1. T-mobile Myfaves is known to sent out SMS automatically, resulting expensive international SMS charge. There have been many users/news reporting this problem found here and here. One of the easiest way to get rid of this application is to use custom firmware.
2. Custom firmware requires root access, but enabling this also allows you to install applications that need root, such as this and this tethering applications to share your mobile phone's 3G internet using bluetooth or wifi for your computer to connect to the internet.
3. Multi-touch browser (not available on official firmware)
4. Ability to upgrade and downgrade to any G1 firmware without restriction anytime you like and not forced to update via OTA (over the air).
5. Transfer applications to your SD card. HTC G1 is well known for its lack of ROM space to install applications, many users simply run out of space to install new applications/games. Custom firmware supports applications (Apps to SD) that allow you to move applications from rom to SD card. the Apps to SD.
6. Full phone backup using Nandroid or other recovery image.

If you are still considering to swtich to custom firmware, you should ask yourself, WHY NOT?

Which firmware to use?

JesusFreke's custom firmware (JF1.5x) was the most popular before he announced his decision to quit the business. Of course there is nothing stopping you to continue to use the latest JF 1.51 ;)

At the time of writing, Cyanogenmod is the most popular firmware with increasing number of features and frequent updates. Check out the Official Cyanogenmod wiki for more information.

For those looking for the a basic rooted firmware, check out enomther's HTC ADP 1.5 CRC1 Rooted Base ROM and HTC ADP 1.6 DRC83 Rooted Base ROM and/or his optional expansion packs.

As always, there are many other custom firmwares out there that you can try (at your risk). You can find the table to compare the firmwares at AndroidSpin. Otherwise, you can always use HTC's original firmware such as the Android developer Phone edition.

Installing custom firmware

These links to the instructions below are NOT meant for ordinary users,so if you are not the type who can't even install windows from sratch, STOP now and use our service. These instruction may not be easy to follow. Even a geek like me can take several hours to learn and diagnose problems with the rooting and flashing is not working as it should. Therefore, if you are unsure, we do recommend that you purchase our G1 flashing service.

So, you are ready to take the pluge and use custom firmware.

Warning:
By using custom firmware, you maybe voiding your warranty. Though you are always flash it back to stock firmware before sending in for repair.
There is a risk that you may BRICK your phone (though G1 is known to be basically unbrickable).
You need to WIPE your phone, so back up first.

Well, detailed instructions for rooting and installing custom HTC G1 firmware onto the US/UK model is already well covered and detailed in other sites. You can read the instructions from xda-developers, androidandme, webnetta, as well as youtube.

For those who have the Australia Optus model, rooting instructions can be found in whirlpool and xda-developers.

Lastly, if you are roaming overseas, make sure you take steps to disable roaming overseas to avoid expensive data charge. You don't want to end up like this poor fellow.

-> settings – wireless controls – mobile networks – data roaming (uncheck box to stop roaming for data).

To make sure, we suggest you remove/change your APN settings to ensure that there is no way that the device can get data via 3G.

Enjoy your G1 and don't forget to let us know how it goes in our official forum.