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Hacking Your HTC Phone

Custom images and dual booting Windows Mobile and Android. Hacking Your HTC Phone. Evolution of Phones/PDA’s. Initially phones and PDA’s were separate devices. Integration of PDA into phone started as glorified contact organizers.

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Hacking Your HTC Phone

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  1. Custom images and dual booting Windows Mobile and Android Hacking Your HTC Phone

  2. Evolution of Phones/PDA’s • Initially phones and PDA’s were separate devices. • Integration of PDA into phone started as glorified contact organizers. • RIM Black Berry led strong efforts towards modern phones/PDA’s. Trenton Computer Festival 2010

  3. Modern Phone Capabilities • Observed that HTC Herald is faster in speed, boot time, and capabilities compared to 486DX2 circa 1994 (personal comparison). • Newer generation phones far exceed even early generation Pentium class CPU’s. • Internet and/or data services are common inclusions in mobile packages. Trenton Computer Festival 2010

  4. What is a phone? • According to Von Neumann design model a computer has three main components: • CPU • Memory • Input/Output • Storage • It’s really just a very small computer. Trenton Computer Festival 2010

  5. Can it be hacked? • If it’s just a computer…. • Why can’t they experience same hacking that GNU/Linux enthusiasts did with PC’s? Trenton Computer Festival 2010

  6. Challenges • No option to boot off CD or alternate media. • Requires more intimate/creative access to boot ROM. • Limited RAM/ROM. Trenton Computer Festival 2010

  7. Model Phone for Presentation • Sold by T-Mobile as the “Wing.” • Branded elsewhere as HTC Herald. • Components: • 201 MHz TI OMAP 850 Processor. • 64 MB RAM (44 MB accessible) • 128 MB ROM • Display: TFT 240 x 320 Touchscreen • Networks: GSM850, GSM900, GSM1800, GSM1900 • Cell Links: CSD, GPRS, EDGE Trenton Computer Festival 2010

  8. Disclaimer • FOLLOW INSTRUCTIONS. • Have backup of data. • Acknowledge risks. • Don’t Brick your phone. Trenton Computer Festival 2010

  9. Custom Images • Vendor/Service provider sells phone with custom image/ROM. • Many alterative ROMs available. • Might require addition efforts to enable basic features such as SMS. Trenton Computer Festival 2010

  10. How to Flash a ROM Instructions • Download Flash Center • Unzip Flash Center in a location of your choice, let's say your Desktop • Download the ROM you want to use • Unzip or unrar the downloaded .NBH file into the RUU folder inside the Flash Center folder • Make sure that you have the .NBH file in the RUU folder and not within another folder • Put your phone into flight mode (Not necessary, but it's recommended) • Connect your phone to your computer via USB and make sure ActiveSync is connected • Go into your Flash Center folder and run herald-uspl.exe • Follow the instructions on the command line that appears •  Once it says it's finished, your phone will restart and you will have your new ROM! • Reference: http://thewingster.com/howtoflashnbhuspl.aspx Trenton Computer Festival 2010

  11. Android • If it can run alternate ROMS, why not a complete different OS? • Limitations of accessing boot ROM require using a boot loader. • Launches in Windows Mobile and supplants it to become active OS. • Current efforts permit running Android 1.5, Cupcake. Trenton Computer Festival 2010

  12. Expectations • NOT a fully functional build. • Not for everyday use (IMO). • Can make calls. • Buttons not intuitive. • Unknown if access to Android app store is available. Trenton Computer Festival 2010

  13. Setting up boot loader for Android • Must run from flash media (microSD). • Create Android filesystem. • Large chunk of flash dedicated to be Android files. • Format filesystem. • Install Wing Linux (the boot loader). • Run boot loader… Trenton Computer Festival 2010

  14. Live demo Trenton Computer Festival 2010

  15. In action on YouTube Trenton Computer Festival 2010

  16. References • HTC Herald specs:http://pdadb.net/index.php?m=specs&id=669&c=htc_p4350_htc_herald_100 • Detailed specs:http://pdadb.net/index.php?m=specs&id=669&view=1&c=htc_p4350_htc_herald_100 • Wingster Custom ROMS:http://thewingster.com/default.aspx • Wing Linux Project (SourceForge.net):http://sourceforge.net/apps/trac/wing-linux/wiki • Mobile Developers Community:http://www.xda-developers.com/ • Just ROMs:http://justkitchen.info/JustROMs/ • View phone screen on computer:http://www.mymobiler.com/ Trenton Computer Festival 2010

  17. Questions • Will the slides be posted?..On the home page blog of www.web-konghttp://www.web-kong.com/presentations/by-event/trenton-computer-festival/hacking-your-htc-phone-with-windows-mobile-and-android Trenton Computer Festival 2010

  18. Thank You! Trenton Computer Festival 2010

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